Python - While Loops - A while loop in Python programming language repeatedly executes a target statement as long as the specified boolean expression is true. This loop starts with while keyword followed by a boolean expression and colon symbol (:). Then
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In fact, all the Python control structures can be intermingled with one another to whatever extent you need. That is as it should be. Imagine how frustrating it would be if there were unexpected restrictions like “Awhileloop can’t be contained within anifstatement” or “whileloops can on...
Python has two kinds of loops; awhileloop, and aforloop. This page explains thewhileloop. We'll get to theforloopnext. In a way,whileloops are kind of similar toifstatements, in that they only do something if a certain condition is true. But the difference is, if the condition is ...
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...
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...
python3 loop_list.py The next city is Chicago The next city is Detroit The next city is New York The next city is Miami The loop has ended. How to Loop Through a Dictionary in Python Python can loop through a dictionary in much the same way it loops through a List. However, the ...
With Python, you can use `while` loops to run the same task multiple times and `for` loops to loop once over list data. In this module, you'll learn about the two loop types and when to apply each.
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 ...
Python while loops can be used to repeatedly execute blocks of code when the number of iterations isn’t known at the time of writing. We explain how.