Pandas While Loop

How to Iterate Through Rows with Pandas iterrows() Pandas has iterrows() function that will help you loop through each row of a dataframe. This is less like the for keyword in other programming languages, and works more like an iterator method as found in other object-orientated programming languages. At a certain point, you realize that you’d like to convert that pandas DataFrame into a list. It seems to be a bug so I am posting here as well. The loop gets translated into a fast C loop and works just like iterating over a Python list or NumPy array. You can do this by creating another variable (column) in the for loop. While Loops. Variables If…Else While Loop For Loops Lists Dictionary Tuples Classes and Objects Inheritance Method Overriding Operator Overloading NumPy PYTHON EXAMPLES Basic Date Time Strings Pandas Matplotlib NLP Object Oriented Programming Twitter Data Mining. Once the variables are set to unique numbers (from 0-7) we us on top of hidingPlaces get value at raccoon/catHidingPlace to place the. Note that the elements in the “textList” does not have a new line character “ ”. Finally, print out offset so you can see how it changes. The iloc indexer syntax is data. Python's loop syntax allows us to express those instructions like this: for ape in apes: print(ape + " is an ape") Let's take a moment to look at the different parts of this loop. It can be one or more statements. Here, we will study Python For Loop, Python While Loop, Python Loop Control Statements, and Nested For Loop in Python with their subtypes, syntax, and examples. Home » Python » Pandas: How to use apply function to multiple columns. In order to calculate the probabilities I need to loop through the dataframe. I've recently started using Python's excellent Pandas library as a data analysis tool, and, while finding the transition from R's excellent data. This post describes different ways of dropping columns of rows from pandas dataframe. Create and call functions. Get and explore breaking Illinois local news alerts & today's headlines geolocated on live map on website or application Three people were injured in a vehicle crash Sunday in the Loop. You'll be able to construct basic and complex while loops, interrupt loop execution with break and continue, use the else clause with a while loop, and deal with infinite loops. This page introduces some basic ways to use the object for computations on arrays in Python, then concludes with how one can accelerate the inner loop in Cython. Both while-loops and if-statements allow you to control how Python flows from one line of code to another in your program. This is convenient if you want to create a lazy iterator. But Python also allows us to use the else condition with for loops. DataFrames are Pandas-objects with rows and columns. Today, we are looking at LOOPS. In this section, we will discuss some general considerations for missing data, discuss how Pandas chooses to represent it, and demonstrate some built-in Pandas tools for handling missing data in Python. Loop statements may have an else clause; it is executed when the loop terminates through exhaustion of the list (with for) or when the condition becomes false (with while), but not when the loop is terminated by a break statement. We then us a while loop to pick a random tile for the racoonHidingPlace variable. And the while key word is actually similar to the four key word, except that a four loop counts through a range of numbers, but. Update plot in a continuous while loop - Python 3, matplotlib Hi, I'm probably trying to commit a horrible sin here - I'm a beginner. It seems to be a bug so I am posting here as well. The syntax of while loop is: while boolean_expression: statement(s) The statements inside the while loop have to be indented as shown in the syntax. Buy Fiskars Classic Comfort Loop Rotary Cutter (45mm), 1, steel and orange: Nozzles - Amazon. I'm using a while loop that I thought would plug the appropriate list values into a dataframe filter one by one. Let’s explore those options step by step. First we will use Pandas iterrows function to iterate over rows of a Pandas dataframe. Continue - Skips the Following Code, Once. However, I haven't written a while loop tutorial yet, which is why I went with the for loop + break solution! Test Yourself! It's time to test whether you have managed to master the if statement, the for loops and the combination of these two!. Here is the syntax. Appending & concatenating Series 50 xp Appending Series with nonunique Indices 50 xp Appending pandas Series 100 xp Concatenating pandas Series along row axis 100 xp. PHP Pandas: Loops ← Back to Index. Results: Five hundred thousand integers. So what is while loop in JavaScript? Simply said, a while loop/statement is a loop that will execute any code blocks inside it for as long as a specified condition is met. Pandas loop through dataframe and list with while loop. A while loop implements the repeated execution of code based on a given Boolean condition. Often the program needs to repeat some block several times. org Mailing Lists: Welcome! Below is a listing of all the public Mailman 2 mailing lists on mail. In Panda BT there are technically no such distinction: every leafs are tasks. In this post, we will write a program in Python to check whether the input number is prime or not. Today, we are looking at LOOPS. but after the first pass of outer loop when it comes for the second iteration , @iLeaveID has already reached the max limit so its not entering the inner loop anymore hence it looks like your outer loop is not working more than once but it is looping each time failing to enter the inner loop. Moreover, we will discuss how Scala while loop works and One Infinite Loop with exmaple. The Queue module provides a FIFO implementation suitable for multi-threaded programming. However, you should always remember that this loop works as long as the condition set for this loop is true. We'll cover both uploading and downloading files with a remote server. iteritems¶ Series. Nested loops. Learn the fundamentals of programming to build web apps and manipulate data. They are also commonly used to loop or iterate over lists. import pandas as pd import numpy as np. However for those who really need to loop through a pandas DataFrame to perform something, like me, I found at least three ways to do it. raw_data =. It contains soccer results for the seasons 2016 - 2019. Some of the Patterns are shown in this article. Une boucle ( ou loop ) vous permet de répéter à l'infini des instructions selon vos besoins. Intermediate Python for Data Science is crucial for any aspiring data science practitioner learning Python. I can't use "continue" or "break" because the code block should execute for each item, and then break when no further items are available. In order to calculate the probabilities I need to loop through the dataframe. Please note that I have. DataFrame in a way that it is possible to use and handle spatial data within pandas (hence the name geopandas). Sometimes, the word 'loop' is a better way to describe an iterator. And that, effectively, is the bones of sending messages between client and server. We start by writing for x in y, where y is the name of the list we want to process and x is the name we want to use for the current element each time round the loop. get_chunk (chunkSize) chunks. x under the hood, however the concept is the same. In Python, these include lists, strings, tuples, dictionaries, for-loop, while-loop, if-else, etc. It is used for making complex decisions. Other than the trick with using a return statement inside of a for loop, all of the loops so far have gone all the way through a specified list. AutoIT simple tutorial on LOOPS - IF, FOR LOOP, WHILE LOOP, DO LOOP Autoit is a very simple yet powerful tool to automate simple scripts. As soon as the condition becomes false, the loop stops iterating. W hen exploring a new dataset and wanting to do some quick checks or calculations, one is tempted to lazily write code without giving much thought about optimization. And while that could be fixed (and it has been fixed in 2. Condition-controlled loop A loop will be repeated until a given condition changes, i. In this tutorial, we will see how to apply conditional statements in Python. 0, first in run time (PS2) and later in Design Time (JDeveloper) as well (PS3 an beyond). The difference between the two is that raw_input accepts the data coming from the input device as a raw string, while input accepts the data and evaluates it into python code. In NT, it is possible to define your own delimiters. For example a for loop can be inside a while loop or vice versa. The Domino data science platform makes it trivial to run your analysis in the cloud on very powerful hardware (up to 32 cores and 250GB of memory), allowing massive performance increases through parallelism. The break, continue, and pass statements in Python will allow you to use for loops and while loops more effectively in your code. The while loop requires relevant variables to be ready, in this example we need to define an indexing variable, i, which we set to 1. Un exemple sera plus parlant:. join('. There are two major considerations when writing analysis results out to a database: I only want to insert new records into the database, and, I don't want to offload this processing job to the database server because it's cheaper to do on a worker node. As you can see, these loop constructs serve different purposes. While this can help create all sorts of interesting programs, you won’t unleash the full power of if-else statements until you combine them with loops – both for and while loops. It is also ideal if you want to use a sentinel value to terminate the loop. Before we deep dive into problem solving, lets take a step back and understand the basics of Python. We then stored this dataframe into a variable called df. The rest of the working is like a while-loop. This is less like the for keyword in other programming languages, and works more like an iterator method as found in other object-orientated programming languages. Used in a for loop, every observation is iterated over and on every iteration the row label and actual row contents are available:. csv) I want to write a code where I will ask a user to choose one of the city from this files: This is ma code: im. I have a sorted dataframe but when I try iterrows() it automatically goes back to iterating based on the index number. Python program that uses for-loop, one-line # Use single-line for-loop syntax. All the statements indented by the same number of character spaces after a programming. Often the program needs to repeat some block several times. Python While Loop. Numpy and Pandas are stumbling block for many people who venture in machine learning. # Initialize offset. iteritems (self) [source] ¶ Lazily iterate over (index, value) tuples. A Counter is a container that keeps track of how many times equivalent values are added. items(): for k, v in dict. A for-loop iterates its body once for each value returned from. You can see, the string is broken into three pieces and a for loop is used to display those items for the returned list. The while loops start with the reserved word 'while' followed by a condition. Iterate over string using for loop. close() at the end. But your logic is way messed up. Running Options. List comprehension is powerful and must know the concept in Python. Find the lowest prices on bestselling Cinhent Resistance Loop Bands Resistance Exercise Bands Yoga Pilates For Home Fitness Stretching Strength Training Physical Therapy Natural Latex Workout Bands 500500 4 in a wide variety of designs. Using the == operator example for Python Null. Create While Loop in Python - 4 Examples. Scala While Loop - Objective. "This grouped variable is now a GroupBy object. Condition-controlled loop A loop will be repeated until a given condition changes, i. try except - managing errors in while loop; Python while loop with multiple conditions logical and vs or; 1 is considered as True, 0 as False; Python while loop read file Python while loop find a line in file; Python while loop. i = 0 while i < 10:. ) It is in Python, which is quickly becoming my go-to language I'm writing a script where I needed to iterate over the rows of a Pandas array, and I'm using pandas 0. Python for loop: Python has for loops, but it differs a bit from other like C or Pascal. A generator call can then be used in place of a list, or other structure whose elements will be iterated over. The axis labels are collectively c. So what is a while loop in JavaScript? So what is a while loop in JavaScript? Simply said, a while loop/statement is a loop that will execute any code blocks inside it for as long as a specified condition is met. In the body of the loop, we increment t by 2, so that it will be an odd value; we increment s by t, summing a sequence of odd values. JS while loop is your ticket to executing code neatly and repeatedly for as many times as you need. Pandas has at least two options to iterate over rows of a dataframe. while offset!=0:. The break and continue statements are used in these cases. There are three types of variables in java: local, instance and static. We can loop over this range using Python's for-in loop (really a foreach). The condition works in an identical way to the while loop. please to help whether I can improve the efficiency. In this tutorial, you'll learn about indefinite iteration using the Python while loop. I try to use pandas to finish this trial, now I can get the right result, but the efficiency is a little low, when I have a 1500 book and 200 macro, it will take about 15 second. So anything that can be looped over with a for loop is an iterable, and sequences are one type of iterable, but Python has many other kinds of iterables as well. Brackets are tokens used as delimiters for lists, index of sequence types, and the slicing operator. Before executing the code inside the loop, the value from the sequence gets assigned to the iterating variable (“iter”). For Loops and Iterations A For Loop is a method of iterating through a string, list, dictionary, data frame, series, or anything else that you would like to iterate through. While R contains four basic data types, NumPy supports far more than this: for example, while R has a single integer type, NumPy supports fourteen basic integer. Furthermore, it doesn't make any sense that 'b' is equivalent to 'a' and 'b'. Here’s an example to. Function and class definitions are also syntactically compound statements. In this tutorial you'll learn how to repeat a series of actions using while loop in Python. Once the variables are set to unique numbers (from 0-7) we us on top of hidingPlaces get value at raccoon/catHidingPlace to place the. Python program that uses for-loop, one-line # Use single-line for-loop syntax. check out the spacing and indentation within the while loop and the if statement. Moreover, we will discuss how Scala while loop works and One Infinite Loop with exmaple. To access each object you need a for loop for each row, then another for loop for each object. It can be used to pass messages or other data between producer and consumer threads safely. If this is a database records, and you are iterating one record at a time, that is a bottle neck, though not very big one. The placing of one loop inside the body of another loop is called nesting. for beginners and professionals. pandas read_csv. When you "nest" two loops, the outer loop takes control of the number of complete repetitions of the inner loop. In this case we want to check to see if numbers are divisible by 4 over and over again and we want to count how many are divisible by 4. iteritems (self) [source] ¶ Lazily iterate over (index, value) tuples. Or feel free to contact us with any other comments or sugestions about the site. iloc¶ Purely integer-location based indexing for selection by position. This is less like the for keyword in other programming languages, and works more like an iterator method as found in other object-orientated programming languages. This is shorter implementation of iterate with keys where we do not need to call iterkeys. My question is for the most efficient way to iterate over rows while keeping the dtype of each element intact. Python for loop: Python has for loops, but it differs a bit from other like C or Pascal. So there are a few things here, so let's walk through it. While loops let the program control to iterate over a block of code. In this article, we will learn how to use Python’s range() function with the help of different examples. In Python, these include lists, strings, tuples, dictionaries, for-loop, while-loop, if-else, etc. The while loop; The for loop The While Loop As a developer who is using this programming language if you wish to execute a set of different statements then to do that you can use the while loop. Do While: – In this loop, condition checking is done at the end of the loop. If you just want the column headers, you can throw them into a list and loop through that list. Brackets are tokens used as delimiters for lists, index of sequence types, and the slicing operator. If your program needs to work through a file, it is usually best to read in the file one line at a time for reasons of memory space and processing speed. ) lives in two dimensions. JS While Loop – Programming Foundations #08. When you're using an iterator, every loop of the for statement produces the next number on the fly. JS while loop is your ticket to executing code neatly and repeatedly for as many times as you need. This code prints the first one fine but then prints 4 empty dataframes afterwards. changes from True to False or from False to True, depending on the kind of loop. Locking is handled for the caller, so it is simple to have as many threads as you want working with the same Queue. TensorFlow Lite for mobile and embedded devices For Production TensorFlow Extended for end-to-end ML components. The if, while and for statements implement traditional control flow constructs. Challenge Your first challenge consists of writing a Python script that will read the following text file, one line at a time and display the content of each line on screen. I'm using a while loop that I thought would plug the appropriate list values into a dataframe filter one by one. Also note outF. It’s true that your Pandas code is unlikely to reach the calculation speeds of, say, fully optimized raw C code. If we will iterate over list like data we generally use for loop. Operator TABLE informs Oracle that the value is a collection, not a scalar value. An if/elif-statement is a generalized if-statement with more than one condition. You then decided to capture that data in Python using pandas DataFrame. Shopping Fashion Spring Baby Shoes Cool Golden PU Leather T-tied Hook &Loop Newborn Boys First Walkers Baby Moccasins Sneakers while using suggestions that have been explained might fare you best than Shopping at a normal shop. The basic anatomy of a for loop is a little something like: for x in y: do_stuff(x,y) This may look complicated but the take home message is that a list can contain anything, and has an implied order. When this loop is done, t is 9, and s is the sum of odd numbers less than 9: 1+3+5+7. Other data structures, like DataFrame and Panel, follow the dict-like convention of iterating over the keys of the objects. Example: Nested for loop in R. The distinctive thing about a while loop is that the conditional test happens before the loop body, not after—so that the code in the loop may be executed zero times. Yet, this remains one of the most challenging topic for beginners. While loops let the program control to iterate over a block of code. The first line of the for loop must end with a colon, and the body must be indented. Count from 0 to 9 This small script will count from 0 to 9. Introduction to Python is a resource for students who want to learn Python as their first language, and for teachers who want a free and open curriculum to use with their students. Iteration is a general term for taking each item of something, one after another. Less than 10: This while-loop continues as long as the variable i has a value less than 10 when the statement is encountered. First outer loop is used to handle number of rows and Inner nested loop is used to handle the number of columns. It’s true that your Pandas code is unlikely to reach the calculation speeds of, say, fully optimized raw C code. for loop iterates over any sequence. I recently posted this on StackOverflow. Skip navigation Sign in. break and continue. 'while' Loop. The second for loop will repeat this process for the devices. It looks like your both the loops are working. Simplify your Python loops. My question is for the most efficient way to iterate over rows while keeping the dtype of each element intact. Loops Up to now, we have only accessed individual items on a list by using their indices. Unlike Sets, the list in Python are ordered and have a definite count. If there is an optional else statement in while or for loop it skips the optional clause also. In python, reshaping numpy array can be very critical while creating a matrix or tensor from vectors. break and continue work the same way with for loops as with while loops. txt in same directory as our python script. I don't get any error, but the while loop gets infinite since the loop is based on the length of the children. Python Fibonacci Series program Using While Loop. Panda on #Backen, #Dinkel, #DIY, #mywork, #Ploetzblog, #Schweinsohren, #Vegan, 29 Jun 2016 Der untragbare Innenminister Ich hoffe ja schon eine ganze Weile, dass Frau Merkel Herrn de Maizière das vollste Vertrauen ausspricht, aber noch scheint es nicht so weit zu sein. randint(0,5) # If the integer is less than 3 if s < 3: # Print this print('It is too small, starting over. Not sure if that was in the original scope. A while-loop checks its termination condition before each entry into the loop body, and terminates if the condition has gone False. The dictionary stores dummy phone numbers with names. The underlying logic of Python for loops. Here is my code:. So we'll start off with some basics so everyone is on the same page. The continue statement in Python returns the control to the beginning of the while loop. " Both of them achieve very similar results, and can almost always be used interchangeably towards a goal. This provides us with the index of each item in our colors list, which is the same way that C-style for loops work. Transformation In addition to aggregating data by groups, we also may want to perform an operation at the observation (row) level that incorporates some group-level attribute. This is shorter implementation of iterate with keys where we do not need to call iterkeys. So what is a while loop in JavaScript? So what is a while loop in JavaScript? Simply said, a while loop/statement is a loop that will execute any code blocks inside it for as long as a specified condition is met. Collection-controlled loop. There are many different ways to count all elements in a list with Python. Simple while Loops¶. 1 To loop all the keys from a dictionary – for k in dict: for k in dict: print(k). Difference Between For and For Each Loop For loop iterates a statement or a block of statements repeatedly until a specified expression evaluates to false. To start, here is the structure of the while loop in Python: while condition is true: perform an action In the next section, you'll see how to apply this structure in practice. There are indeed multiple ways to apply such a condition in Python. iloc[, ], which is sure to be a source of confusion for R users. The first would loop through the use_id in the user_usage dataset, and then find the right element in user_devices. Nested loops are frequently (but not always) bad practice, because they're frequently (but not always) overkill for what you're trying to do. Seeing that a while loop can do the same thing as a for loop. Python doesn't know this kind of loop. Read a Text File Line by Line Using While Statement in Python Here is the way to read text file one line at a time using "While" statement and python's readline function. A lot of the programming I do is with arrays; I often have to match items in two or more arrays that are of different sizes and the first thing I go to is a for-loop or even worse, a nested for-loop. So, first, we've got a crashed = False statement, which is just a variable that we set initially. Please note this is not a machine learning course. Finally, print out offset so you can see how it changes. A while loop statement in Python programming language repeatedly executes a target statement as long as a given condition is true. Do While - Loop. while_stmt::= "while" expression ":" suite ["else" ":" suite] This repeatedly tests the expression and, if it is true, executes the first suite; if the expression is false (which may be the first time it is tested) the suite of the else clause, if present, is executed and the loop terminates. Create A pandas Column With A For Loop. A while loop which takes too much time can affect the timing of other parts of your sketch. while and if are therefore called flow-of-control constructs. I try to use pandas to finish this trial, now I can get the right result, but the efficiency is a little low, when I have a 1500 book and 200 macro, it will take about 15 second. Running Options. break and continue work the same way with for loops as with while loops. Understand the use of loops in programming. Need to create while loop in Python? If so, I’ll show how to create this type of loop using 4 simple examples. IF you need a while loop, think twice, after thinking you need one, make sure it always ends within the condition or with a break. In this case we want to check to see if numbers are divisible by 4 over and over again and we want to count how many are divisible by 4. Iterating over the string is simple using for loop and in operator i. Your lists contain 19 elements - so your solution performs an order of 361 operations. We have already solved the problem of printing out a nice-looking conversion table for Celsius and Fahrenheit degrees. Example: Nested for loop in R. Python's for loops don't use indexes. This tutorial covers various ways to execute loops in python with several practical examples. This post shows how to define an array, and to loop through each of the items in it. Iterate over rows and columns in Pandas DataFrame Else While Loop For Loops Lists Dictionary Tuples Classes and Objects Inheritance Method Overriding Operator. changes from True to False or from False to True, depending on the kind of loop. We use the index value of i to select a row from the table, and the index value of j to select a column from that row. There are for and while loop operators in Python, in this lesson we cover for. The input is a (n by 2) array called scaletestmatrix (in this case a 6x2 array). Like a for loop, the while loop can repeatedly execute a sequence of instructions, but instead of repeating a set number of times based on a sequence of values, the while loop repeats as long as some condition is True. This method returns an iterable tuple (index, value). You’ve already seen that, for example, a while-loop might contain an if-statement. At the end, it boils down to working with the method that is best suited to your needs. This is best done with a while loop. You then decided to capture that data in Python using pandas DataFrame. 13、jupyter notebookです。. CODE SNIPPET CATEGORY; How to find optimal parameters for CatBoost using GridSearchCV for Classification? Machine Learning Recipes,find, optimal, parameters, for, catboost, using, gridsearchcv, for, classification. Loop over data frame rows Imagine that you are interested in the days where the stock price of Apple rises above 117. Find the lowest prices on bestselling Cinhent Resistance Loop Bands Resistance Exercise Bands Yoga Pilates For Home Fitness Stretching Strength Training Physical Therapy Natural Latex Workout Bands 500500 4 in a wide variety of designs. Appending & concatenating Series 50 xp Appending Series with nonunique Indices 50 xp Appending pandas Series 100 xp Concatenating pandas Series along row axis 100 xp. In this post, we’ll show you how to parallelize your code in a variety of languages to utilize multiple cores. In this case we want to check to see if numbers are divisible by 4 over and over again and we want to count how many are divisible by 4. Are you suggesting df. Simple pyramid. It can be used to implement the same algorithms for which bag or multiset data structures are commonly used in other languages. Pandas : 6 Different ways to iterate over rows in a Dataframe & Update while iterating row by row;. Learn Python, a powerful language used by sites like YouTube and Dropbox. Pandas read_csv function is popular to load any CSV file in pandas. Since we have no integer type, we floor the result of the division each time. The while loop will run as long as the variable counter is less or equal with 100. An instructive first step is to visualize, given the patch size and image shape, what a higher-dimensional array of patches would look like. This method returns an iterable tuple (index, value). In Python, list is a type of container in Data Structures, which is used to store multiple data at the same time. We then accumulate the frequency occurances in the frequency table, fq. Stop/Exit while loop C++ using user / keyboard input: Terminates program when Q or ESC gets pressed. Seeing that a while loop can do the same thing as a for loop. Python has a built in dictionary type called dict which you can use to create dictionaries with arbitrary definitions for character strings. Also you need the trailing : (colon) to introduce a suite of statements (a "bl. Python's loop syntax allows us to express those instructions like this: for ape in apes: print(ape + " is an ape") Let's take a moment to look at the different parts of this loop. While this can help create all sorts of interesting programs, you won’t unleash the full power of if-else statements until you combine them with loops – both for and while loops. A for-loop iterates its body once for each value returned from. while(x < 5) {x <- x+1; print(x);} for loop. first argument must be an iterable of pandas objects, you passed an object of type "DataFrame" Creating a while. However, I haven't written a while loop tutorial yet, which is why I went with the for loop + break solution! Test Yourself! It's time to test whether you have managed to master the if statement, the for loops and the combination of these two!. So, while loop iterate up to 11 times. You might think that under the hood Python's for loops use indexes to loop. IF you need a while loop, think twice, after thinking you need one, make sure it always ends within the condition or with a break. We can see that it iterrows returns a tuple with row index and row data as a Series object. OK, I Understand. These capabilities are available with the for loop as well. Here we're manually looping over an iterable using a while loop and. Chapter 8 Lists 8. Pour créer une boucle , il faut donc utiliser ce mot clé suivi d'une indication qui dit quand la boucle s'arrête. 75s so there is no reason I can’t do this many more times if need be. The range is a built-in function in Python that represents an immutable sequence of numbers. We then us a while loop to pick a random tile for the racoonHidingPlace variable. Python Forums on Bytes. Mastering this concept would help you in two ways: You would start writing. Find the lowest prices on bestselling Cinhent Resistance Loop Bands Resistance Exercise Bands Yoga Pilates For Home Fitness Stretching Strength Training Physical Therapy Natural Latex Workout Bands 500500 4 in a wide variety of designs. " Both of them achieve very similar results, and can almost always be used interchangeably towards a goal. Python is a popular, powerful, and versatile programming language; however, concurrency and parallelism in Python often seems to be a matter of debate. The pandas package provides various methods for combining DataFrames including merge and concat. The while loop requires relevant variables to be ready, in this example we need to define an indexing variable, i, which we set to 1. The statements inside the loop are executed and the flow returns to evaluate the condition again.