Feb 13, 2020 · True is always True, so while True will loop forever. The while keyword takes an expression, and loops while the expression is true. True is an expression that is always true. As a possibly clarifying example, consider the following: a = 1 result = a == 1 Here, a == 1 will return True, and hence put True into result. Hence, a = 1 while a == 1: ...

Nov 11, 2024 · Don't use while True and break statements. It's bad programming. Imagine you come to debug someone else's code and you see a while True on line 1 and then have to trawl your way through another 200 lines of code with 15 break statements in it, having to read umpteen lines of code for each one to work out what actually causes it to get to the break.

May 13, 2016 · I don't think there is a preference really. A while-loop will continue to execute the code block as long as the boolean expression specified remains True. flag == True, not Flag, i < 6 or evaluate to boolean expressions. If you just say while True like in your example, you will just enter an infinite loop. Does that answer your question?

Mar 2, 2018 · La sintáxis de la sentencia while es la siguiente: while [expresión]: [cuerpo] Es decir, se ejecuta el [cuerpo] de la sentencia while mientras [expresión] siga siendo evaluado como verdadero. ¿Cómo funciona un bucle while True: en Python 3? Como True siempre seguirá siendo verdadero hasta el fin de los tiempo podemos deducir que:

while True: test = 0 if test == 5: break test = test - 1 If you say while True in a loop context, normally your intention is to stay in the loop forever. If that's not your intention, you should consider other options for the structure of the loop.

Nov 1, 2012 · I am reading serial data and writing to a csv file using a while loop. I want the user to be able to kill the while loop once they feel they have collected enough data. while True: #do a bunch of serial stuff #if the user presses the 'esc' or 'return' key: break

You need to understand that the break statement in your example will exit the infinite loop you've created with while True. So when the break condition is True, the program will quit the infinite loop and continue to the next indented block. Since there is no following block in your code, the function ends and don't return anything.

Aug 1, 2012 · I'm just starting out with Python 2.7 and I don't understand why something is happening: In the following code, an embellished version of an example from the python 2.7.2 tutorial, I get an unexpe...

Jun 30, 2016 · @Ev. Kounis:- Saw your suggestion. But I think flag == True is not reqd inside while. Even if it's infinite, it will break based on the if inside while. Hence the checking of flag will do the part! your suggestions plz! –

Apr 25, 2016 · password is not an input equal to string "your password", which makes the while expression True, while true repeat. if password does equal 'your password' expression is false, exit loop. While password equals anything except 'your password', expression is True, repeat loop till False. If loop becomes False, print end of line, 'Thank you', end ...