while loop python example

while loop in python is used to iterate(repeat) a block of code till the condition is true.

syntax:

while condition:

    #code to repeat

example 1: 

print from 1 to 10 using a while loop.

i=1

while i<=10:

    print(i)

    i+=1

example 2: 

print from 10 to 1 using a while loop

i=10

while i>=1:

    print(i)

    i-=1

example 3: 

write a program that executes a loop to print hello. the loop will break if the user entered 'n'.

while True:

    print("hello")

    permit=input("you want to continue :y/n")

    if permit=="n":

        break

    else:

        pass

note: 

         1. break keyword is used to stop the pursuing loop.

         2. empty code is not allowed in loops, so if we do not want to execute any task then we use the                 pass keyword 

         3. if passed True in the place of condition in the while loop, then the loop will go for infinite

              repetition