Python While loop

python while loop :

• The while loop is also known an precondition loop.
• While loop allows the part of code to be executed when the given condition is true.

• while loop is mostly used where the number of iteration is not known in advance.

Syntax : 

                  While Expression(condition):

                          Statements.......

Example :

     >>>i =1

     >>> while i<=10:

     print(i)

     i = i+1

     1

     2 

     3

     4

     5

     6

     7

     8

     9

     10

     >>> 

printing the table of the given number using While loop :

     >>> i = 1

     >>> n = int(input("Enter number :"))

     Enter number :10

     >>> while i<=10:

         print(n * i)

         i = i+1

     10 

     20

     30

     40

     50

     60

     70

     80

     90

     100

     >>> 

Exercise : write a program to find even number in range 1 to 10 using while loop ,comments your answer.