ExampleGet your own Python Server Print i as long as i is less than 6: i =1 whilei <6: print(i) i +=1 Try it Yourself » Note:remember to increment i, or else the loop will continue forever. Thewhileloop requires relevant variables to be ready, in this example we need to def...
Python 2.5 While Loops while Loops#while循环 An if statement is run once if its condition evaluates to True, and never if it evaluates to False. A while statement is similar, except that it can be run more than once. The statements inside it are repeatedly executed, as long as the condi...
UsingwhileLoops for Event Loops Another common and extended use case ofwhileloops in Python is to createevent loops, which are infinite loops that wait for certain actions known asevents. Once an event happens, the loop dispatches it to the appropriateevent handler. ...
) is greater than or equal to 0, but less than the length of the grid. If the user wrote a place that’s on the grid, Python moves on to the next step. Otherwise, it will tell the user to try again and let the user try again. Lastly, the function gives back the user’s inpu...
In this quiz, you’ll test your understanding of Python while Loops: Repeating Tasks Conditionally. The while keyword is used to initiate a loop that repeats a block of code while a condition is true. A while loop works by evaluating a condition at the start of each iteration. If the ...
This article covers the construction and usage of While loops in Python. While Loop In Python A while statement iterates a block of code till the controlling expression evaluates to True. While loop favors indefinite iteration, which means we don't specify how many times the loop will run in...
8.Whataresomeoftheadvantagesofusingwhileloops? Whileloopsarerelativelyeasytounderstandand implement,andtheycanbeusedtocreateawidevarietyof controlflowpatterns. 9.Whataresomeofthedisadvantagesofusingwhile loops? Whileloopscanbeinefficientiftheconditionis checkedfrequently,andtheycanbedifficulttodebugif thecondition...
While Loops in PythonKhan Academy
Python will again move back to the condition of the while loop and attempt to re-run the code. Because 3.125 is greater than 1, the code makes the calculation. Finally, the new condition of the while loop is less than 1, so the code results in an error and won't run. ...
In Python,whileloops are constructed like so: while[a conditionisTrue]:[do something] Copy The something that is being done will continue to be executed until the condition that is being assessed is no longer true. Let’s create a small program that executes awhileloop. In this program, ...