With the while loop we can execute a set of statements as long as a condition is true. Note: remember to increment i, or else the loop will continue forever. The while loop requires relevant variables to be ready, in this example we need to define an indexing variable, i, which we set to 1.

Jan 13, 2018 · To repeat something for a certain number of times, you may: # do something here. i += 1 . # do something here. _ += 1. As for nested while loops, remember to always keep the structure: j = 0.

Python’s while loop enables you to execute a block of code repeatedly as long as a given condition remains true. Unlike for loops, which iterate a known number of times, while loops are ideal for situations where the number of iterations isn’t known upfront.

Jan 31, 2012 · You need to use the break command to exit the loop. while True: new_short=raw_input('Country Name in short:') new_full=raw_input('Country Name in full:') countries[new_short]=new_full. answer=raw_input('want to add more?') if answer in ('yes'): answer = True. break. if answer in ('no'): answer = False. break. print countries . return answer.

Dec 10, 2024 · Python While Loop is used to execute a block of statements repeatedly until a given condition is satisfied. When the condition becomes false, the line immediately after the loop in the program is executed. In this example, the condition for while will be True as long as the counter variable (count) is less than 3.

Mar 8, 2025 · In Python, a while loop is used to execute a block of statements repeatedly until a given condition is satisfied. When the condition becomes false, the line immediately after the loop in the program is executed.

There are two ways to do this. First is like this: inp = raw_input() # Get the input. if inp == "": # If it is a blank line... break # ...break the loop. The second is like this: inp = raw_input() # Get the input again. Note that if you are on Python 3.x, you will need to replace raw_input with input.

Aug 18, 2023 · Infinite loops with counters and similar use cases can often be written more easily using these functions. A while loop in Python is written as follows: You can specify multiple conditions for the condition part with and or or. Use break to break a while loop.

Feb 5, 2024 · These eight Python while loop examples will show you how it works and how to use it properly. In programming, looping refers to repeating the same operation or task multiple times. In Python, there are two different loop types, the while loop and the for loop.

In Python, we use a while loop to repeat a block of code until a certain condition is met. For example, print(number) number = number + 1. Output. In the above example, we have used a while loop to print the numbers from 1 to 3. The loop runs as long as the condition number <= 3 is True. # body of while loop. Here,