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while keyword with example in Python

Python while keyword: Here, we are going to learn about the while keyword with example.
Submitted by IncludeHelp, on April 15, 2019

Python for keyword

while is a keyword (case-sensitive) in python, it is used to create a while loop.

Syntax of while keyword

    while condition:
	    statement(s)

Example:

    cnt = 1 # counter
    # loop
    while cnt<=10:
        print(cnt)
        cnt += 1

    Output:
    1
    2
    3
    4
    5
    6
    7
    8
    9
    10

Python examples of while keyword

Example 1: Print numbers from 1 to n.

# python code to demonstrate an example 
# of while  keyword 

# Print numbers from 1 to n
n = 10

cnt = 1 # counter
# loop
while cnt<=n:
    print(cnt)
    cnt += 1

Output

1
2
3
4
5
6
7
8
9
10

Example 2: Iterate a list and print its elements

# python code to demonstrate an example 
# of while keyword 

# Iterate a list and print its elements 

# declare a list
cities = ["New Delhi", "Mumbai", "Chennai", "Banglore"]

index = 0 # index/counter

# loop to iterate the list
while index<(len(cities)):
    print(cities[index])
    index += 1

Output

New Delhi
Mumbai
Chennai
Banglore