But unlike while loop which depends on condition true or false. We generally use this loop when we don't know the number of times to iterate beforehand. while True: n = raw_input("Please enter 'hello':") if n.strip() == 'hello': break Python docs about while loop So a while loop should be created so that a condition is reached that allows the while loop to terminate. x = 6 while x: print (x) x … How to use "For Loop" In Python, "for loops" are called iterators. C provides while loops and do while loops. Question or problem about Python programming: def play_game(word_list): hand = deal_hand(HAND_SIZE) # random init while True: cmd = raw_input('Enter n to deal a new hand, r to replay the last hand, or e to end game: ') if cmd == 'n': hand = deal_hand(HAND_SIZE) play_hand(hand.copy(), word_list) print elif cmd == 'r': play_hand(hand.copy(), word_list) print elif […] In the while … Here is a quick guide on how to create an infinite loop in python using a ‘while true’ statement. The condition is true, and again the while loop is executed. There are number of reason that you might want to implement this; a great use case would be outputting a fluctuating variable to the terminal such as a temperature reading from a sensor. In this tutorial, we will learn some of the ways to create an infinite while loop, with the help of example Python programs. Python only provides while loops. And so long as this condition is true, the countdown will decrease by intervals of 1. In a while loop, the test condition is checked first and if it is true then the block of statements inside the loop is executed. The condition may be any expression, and true is any non-zero value. >>> while True: print(0) 0 0 0 0 0 0 0 0 0 0 0 0 0 Traceback (most recent call last): File "", line 2, in print(0) KeyboardInterrupt The loop runs until CTRL + C is pressed, but Python also has a break statement that we can use directly in our code to stop this type of loop. In this article, we show how to exit a while loop with a break statement in Python. Here is the full Python code to perform the while loop for our example: countdown = 10 while countdown > 3: print ('CountDown = ', countdown) countdown = countdown - 1 Once you run the code, you’ll get the following countdown: This continues till x becomes 4, and the while condition becomes false. The syntax of a while loop in Python programming language is −. This may be when the loop reaches a certain number, etc. while expression: statement(s) Here, statement(s) may be a single statement or a block of statements. Python Infinite While Loop. The while loop in Python is used to iterate over a block of code as long as the test expression (condition) is true. While True → Loop will run forever unless we stop it because the condition of while is always True.. We can stop it using break statement. To make the condition True forever, there are many ways. I won’t consider “[code ]while True:[/code]” always as a bad coding style with Python. Python allows an optional else clause at the end of a while loop. Syntax while if. Syntax of while Loop in Python while test_expression: Body of while. A while loop statement in Python programming language repeatedly executes a target statement as long as a given condition is true.. Syntax. Having True as a condition ensures that the code runs until it's broken by n.strip() equaling 'hello'. while True: # statement (s) If not condition: break; In python, while loop repeatedly executes the statements in the loop if the condition is true. To make a Python While Loop run indefinitely, the while condition has to be True forever. How to Exit a While Loop with a Break Statement in Python. The else clause will be executed when the loop terminates normally (the condition becomes false). Just like while loop, "For Loop" is also used to repeat the program.
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