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For this, I determined how to use a couple methods to break the FOR Loop prematurely effectively turning it into a "DO WHILE" or "DO UNTIL" Loop, which is otherwise sorely lacking in CMD. NOTE: Most of the time a loop will continue to iterate past the condition you checked for, often this is a wanted behavior, but not in our case.
@SIslam Kind of. break stops the while loop, but there isn't a 'False signal': while means 'loop while the expression following the while statement evaluates as True', so if what comes after while is True itself, while will loop forever; break means 'stop looping right now' and works any loop, including both while and for loops.
This helps in many cases. For example, it can help you in comparing the runtime of the operation above with the following: 1. Input n. 2. Input m. 3. Repeat m OperationX n times. The Big O notation will tell you that the former is O (n) and the latter is O (m * n) (assuming OperationX takes a constant time).
Hi @tkirk1222, welcome to Stack Overflow! When answering questions, please try to keep your answers as general and on topic as possible and offer up more of an explanation. In this case, the question asks about stopping a while True loop, so you should explain the part of your code that does that (the break statement). The other stuff may be ...
The do-while loop is an exit-condition loop. This means that the body of the loop is always executed first. Then, the test condition is evaluated. If the test condition is TRUE, the program executes the body of the loop again. If the test condition is FALSE, the loop terminates and program execution continues with the statement following the while.
condition1 = False. condition2 = False. val = -1. #here is the function getstuff is not defined, i hope you define it before. #calling it into while loop code. while condition1 and condition2 is False and val == -1: #as you can see above , we can write that in a simplified syntax. val,something1,something2 = getstuff() if something1 == 10:
Try the following: import time. timeout = time.time() + 60*5 # 5 minutes from now. while True: test = 0. if test == 5 or time.time() > timeout: break. test = test - 1. You may also want to add a short sleep here so this loop is not hogging CPU (for example time.sleep(1) at the beginning or end of the loop body).
@inspectorG4dget: On modern Python 3's CPython reference interpreter, the set will perform better, but prior to 3.2, it would have performed worse (because it rebuilt the set prior to each test).
Write a program that generates 100 random numbers (in the range of 1-1000) and keeps a count of how many of those random numbers are even and how many are odd. Display the results to the screen as seen in the sample output below. Hint: Use a while loop to loop 100 times. My result: random.randint(1,1000) num = num + 1.
It's definition also mentions its use in a while loop: continue may only occur syntactically nested in a for or while loop. But in this (also highly upvoted) question about the use of continue, all examples are given using a for loop. It would also appear, given the tests I've run, that it is completely unnecessary. This code: