Python Function

Python Function :

• Function is a block of reusable code or program  which can be called whenever required.
• python allows us to divide a large program into the basic blocks of code known as function.
• A function called multiple times.
• python provide us various inbuilt function like print() , range() etc.which can called user defined function.
• in python we can use def( ) keyword to define function.

Syntax :

     def function_name():

          statements....

          return  expression

Examples :

• A simple Function without parameters 

     >>> def hello_world():

         print("Hello World")

     >>> hello_world()

     Hello World

     >>> 

• function with one parameter.

     >>> a = 5

     >>> def num(a):

         print(a)

     >>> num(a)

     5

     >>> 

• function with two parameter

     >>> def sum(a,b):

         return a + b

     >>> print(sum(10,20))

     30

     >>> 

Exercise : Comment your answer....Write a program to display number from 1 to 10 using function.