while(condition):Ī small example to demonstrate the same is as below: i = 2 while(i <= 3): If there are any program requirements to execute a sentence after the loop, we can construct an " else" statement that would execute when the condition returns " False." After the " else" statement, the loop exits. The while loop in python also supports another interesting use case. Please refer to python lists and break statements in python to learn more about them. The example above uses python lists and breaks statements in the code. Week = Ĭan you think out the output of this code using the iteration process? I have shown a program to implement in the snippet below while true in python with a sure path of exit. Every program has its demands, and as you work your way forward, you will be able to implement this with variations. Typically, while true in python is used with a nested if-else block, but this is not standard, and there is no such rule. Your loop will continuously eat the resources and waste time. Use this condition carefully as if your break statement is never touched. The following code will run infinitely because " True" is always " True" (no pun intended!). Instead of declaring any variable, applying conditions, and then incrementing them, write true inside the conditional brackets. The while true in python is simple to implement. We then write the break statements inside the code block. It is a practice followed to indicate that the loop has to run until it breaks. There is a concept of declaring a condition true in python or any other programming language without evaluating any expression. I hope it comes in handy while practicing for the “ while” loop in python. The flowchart of python " while" loop would look as follows: Now that we know the working and construction of the while loop, we can visualize the loop's flow through a flowchart. Moreover, the statement in a single line as follows: while(condition): Single Statement If the code block inside the while loop is a single statement, the programmer can also write the while loop. Iteration 6: i = 6 i <= 5 returns False Loop ExitĬan you guess what would happen if I skip the line i = i + 1? Run it and find out! Iteration 5: i = 5 i <=5 return True Good Morning printed Iteration 2: i = 2 i <= 5 return True Good Morning printed Iteration 1: i = 1 i <= 5 return True Good Morning printed When we compile and run the code, the following iterations occur during the loop execution: print( "Good Morning")Ĭombining my code, it will look as follows: i = 1 while(i <= 5): The indented code will be the code I would like to execute when the condition returns True. Therefore, the condition block will look as follows: Now I want " Good Morning" to be printed 5 times. To implement the while loop in Python, we first need to declare a variable in our code as follows (since initialization is not like the for loop): i = 1 We shall see them steadily into the post. The conditions can be as simple as (i < 5) or a combination of them with the boolean operators' help in python. The while loop contains only condition construct and the piece of indented code, which will run repeatedly. The syntax for python while loop is more straightforward than its sister " for" loop. It is therefore advisable to construct this loop carefully and give it a read after writing. For example, if you forgot to increment the value of the variable " i", the condition " i < x" inside " while" will always return " True". It is necessary to be extra cautious while writing the python " while" loop as these missing statements can lead to an infinite loop in python. As a programmer, you have to write this explicitly, such as " i = i + 2". Unlike the " for" loop in python, the while loop does not initialize or increment the variable value automatically. The while loop in python is a way to run a code block until the condition returns true repeatedly. How to implement while loops in Python?.This post will cover the basics in the following fields: If you are unaware, I highly recommend going through the python "for" loops and brief yourselves with the basics. Since this is also a loop, the work needs no introduction in this post. With different variations and methods introduced in loops, we are all set to move ahead to the next and probably the only other important loop in Python: python while loop. In the last post about Python "for" loops, we got introduced to Python's concept and how does Python handle loop.
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