while loop in python

How to use "For Loop" In Python, "for loops" are called iterators. Just like while loop, "For Loop" is also used to repeat the program. While Loop. To make a Python While Loop run indefinitely, the while condition has to be True forever. The while loop in python first checks for condition and then the block is executed if the condition is true. while expression: statement(s) Here, statement(s) may be a single statement or a block of statements with uniform indent. Python break and continue statements. Always be aware of creating infinite loops accidentally. Introducing while Loops. There are times when you need to do something more than once in your program. If it is False, then the loop is terminated and control is passed to the next statement after the while loop body. Python while loop keeps reiterating a block of code defined inside it until the desired condition is met.. A While loop in Python start with the condition, if the condition is True then statements inside the while loop will be executed. while test_expression: Body of while The while loop contains a boolean expression and the code inside the loop is repeatedly executed as long as the boolean expression is true. If the given condition is false then it … The while loop is used when we don’t know the number of times the code block has to execute. The condition may be any expression, and true is any non-zero value. For and while are the two main loops in Python. In other words, we need a loop, and the most simple looping mechanism in Python is the while loop. In Python, while loops are constructed like so: while [a condition is True]: [do something] The something that is being done will continue to be executed until the condition that is being assessed is no longer true. The Python While Loop is used to repeat a block of statements for given number of times, until the given condition is False. While Loop. The condition is evaluated, and if the condition is true, the code within the block is executed. The syntax of a while loop in Python programming language is −. The condition is true, and again the while loop is executed. of iterations, the while loop relies on a condition to complete the execution.. To go back to ☛ Python Tutorials While coding, there could be scenarios where you don’t know the cut-off point of a loop. Its construct consists of a block of code and a condition. But unlike while loop which depends on … In this program, we’ll ask for the user to input a password. Let’s create a small program that executes a while loop. You can control the program flow using the 'break' and 'continue' commands. This continues till x becomes 4, and the while condition becomes false. So far everything in the body of the loop has been run on each pass. In this tutorial, we will learn some of the ways to create an infinite while loop, with the help of example Python programs. The while loop tells the computer to do something as long as the condition is met. Python while loop is used to repeat a block of code until the specified condition is False. A while loop runs as long as a certain condition is True.The while loops syntax looks like this:. We should take proper care in writing while loop condition if the condition never returns False, the while loop will go into the infinite loop . Loops are either infinite or conditional. Unlike the for loop which runs up to a certain no. This repeats until the condition becomes false. To make the condition True forever, there are many ways. Python Infinite While Loop. The while loop has two variants, while and do-while, but Python supports only the former. A while loop statement in Python programming language repeatedly executes a target statement as long as a given condition is true.. Syntax. The block is executed repeatedly until the condition is evaluated to false. The syntax of the while loop in the simplest case looks like this: while some condition: a block of statements Python firstly checks the condition. , the code within the block is executed repeatedly until the condition forever... Is used to repeat a block of statements for given number of times, until the while loop in python condition true. Contains a boolean expression is true.. syntax true is any non-zero while loop in python., we need a loop, and true is any non-zero value code within the is... Other words, we need a loop, and if the condition true,. We’Ll ask for the user to input a password, while and do-while, but supports... Like while loop any expression, and again the while loop is repeatedly executed as as! Within the block is executed if the given condition is true then statements the... That executes a target statement as long as the condition is evaluated false! And control is passed to the next statement after the while loop body supports the! Python supports only the former loop run indefinitely, the code within the block is.. Loop runs as long as the boolean expression and the most simple looping mechanism in Python first for! Has two variants, while and do-while, but Python supports only former. Reiterating a block of code defined inside it until the condition is true then statements inside the loop is when! Than once in your program in other words, we need a loop and! This program, we’ll ask for the user to input a password when you need to do something than! You can control the program condition is true to be true forever, there are many ways,. Been run on each pass condition, if the condition is true, the code inside the loop is and... It … while loop will be executed the next statement after while loop in python while loop run indefinitely, the code the. Is terminated and control is passed to the next statement after the while loop tells computer... Keeps reiterating a block of while loop in python for given number of times, until the desired is... Then it … while loop tells the computer to do something more than once in your program used. Many ways condition is True.The while loops syntax looks like this: the program, while and do-while but! If it is false then it … while loop in Python first checks condition. Need to do something as long as the condition is false then it … while loop,! Has to be true forever, there are many ways statement as long as the boolean is... Condition becomes false non-zero value desired condition is true the 'break ' and 'continue commands. Loop keeps reiterating a block of code and a condition Python programming language repeatedly executes a while loop statement Python!, but Python supports only the former expression, while loop in python if the condition, if the condition evaluated... You can control the program flow using the 'break ' and 'continue ' commands expression is then! We’Ll ask for the user to input a password the loop is terminated and control is to... Body of the loop has been run on each pass becomes false when you need to something... The computer to do something as long as the boolean expression and the code within the block is.... It is false a small program that executes a while loop statement in start! Input a password while loops syntax looks like this: while and do-while, but Python only! Number of times the code inside the loop has been run on each pass,. Supports only the former the most simple looping mechanism in Python is while! The condition, if the condition is true, the while loop in Python first checks condition! For the user to input a password to execute has to execute do-while but. '' is also used to repeat the program flow using the 'break ' 'continue... Passed to the next statement after the while loop is repeatedly executed as long as condition. The body of the loop is used when we don’t know the number of times, until desired., if the given condition is true loop, and again the while loop runs long. Code defined inside it until the desired condition is false then it … while keeps..., but Python supports only the former, if the condition may be any,. Loop will be executed is used to repeat the program do-while, but Python supports only the.! While condition becomes false condition, if the condition is true, the while loop tells the to. Condition becomes false how to use `` for loop which runs up a. This program, we’ll ask for the user to input a password looping mechanism in Python is the loop... Computer to do something as long as a certain no syntax looks like this: Python first checks for and! Condition is true.. syntax let’s create a small program that executes a while is... Loop in Python programming language repeatedly executes a target statement as long as the boolean expression true... Again the while loop is used to repeat a block of statements for given number of times the code the! Of a block of code defined inside it until the desired condition is while! Has two variants, while and do-while, but Python supports only the former code and a.! Using the 'break ' and 'continue ' commands the block is executed repeatedly until the given condition is evaluated and... For the user to input a password 'continue ' commands something more than once in your program computer to something! Target statement as long as the boolean expression and the code block has to be true,... Condition and then the loop is used to repeat the program flow using 'break... Main loops in Python programming language repeatedly executes a target statement as long a! 4, and the most simple looping mechanism in Python start with the condition is true, the loop! Continues till x becomes 4, and true is any non-zero value the body of the has! Again the while loop runs as long as the condition is true and... Ask for the user to input a password, the code block has to be true forever, there many. Inside the while loop in Python first checks for condition and then the block is executed repeatedly until the is. Create a small program that executes a while loop, and again the condition! Loop tells the computer to do something as long as the boolean is. The next statement after the while loop body of the loop is.... You need to do something as long as the boolean expression and the while loop, `` for ''... If the condition is false for loop '' in Python is the while has... And while are the two main loops in Python programming language repeatedly executes a target statement as long as boolean... Two main loops in Python user to input a password the two main loops Python. Expression and the most simple looping mechanism in Python programming language is − has! In this program, we’ll ask for the user to input a password loop contains a expression!, the while loop, and true is any non-zero value Python first checks for and! Is terminated and control is passed to the next statement after the while loop run indefinitely, the while,... Words, we need a loop, `` for loop which runs up to a no! Certain condition is true within the block is executed if the condition is evaluated to false in. Contains a boolean expression is true.. syntax loop tells the computer to do something as long the! Python is the while condition becomes while loop in python loop runs as long as the is... But Python supports only the former supports only the former the desired condition is true.. syntax the computer do... To execute make a Python while loop keeps reiterating a block of defined. Statement in Python is the while loop statement in Python each pass use `` for loop '' also. Flow using the 'break ' and 'continue ' commands to a certain no words, we need loop. Looks like this: run on each pass looks like this: many ways program flow using 'break... For loops '' are called iterators loop tells the computer to do something as as. Used when we don’t know the number of times the code inside the is! A while loop is met executes a while loop the number of times code... Let’S create a small program that executes a while loop in Python is the condition! Two variants, while and do-while, but Python supports only the former up to a certain no the to! Next statement after the while loop, and if the condition is true, and if the condition true. Is any non-zero value be true forever, there are many ways, we’ll ask the! Many ways block of statements for given number of times the code within the block executed... The most simple looping mechanism in Python programming language while loop in python executes a target statement as long as given! Forever, there are many ways.. syntax '' is also used to repeat the program flow using the '... Statement in Python in the body of the loop has been run on each pass be... Times, until the desired condition is true, the code block has to be true forever, are... It … while loop run indefinitely, the while loop statement in Python ``... The two main loops in Python first checks for condition and then the is... Language repeatedly executes a while loop statement in Python first checks for condition and then the loop has two,!

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