Function in Python

A function is a set of codes which executes at a time and used to perform some actions

Function Syntax

Def: Key

Function Name

Input Values

Function Body

Return Value

Key    Name           Input          Body               ReturnValue

"def"  funcname "(" [parameter_list] ")" ":" suite

Function Code snippet

#Function without input/output

Definition

def my_function():

    print("Hello  Function!")

Calling

my_function()

#Function with input

def printhello( str ):   "This is hello test print  function"

   print str

   return;

printhello(“hello”)

# Function with return

def sum_two_numbers(a, b):

    return a + b

 sum_two_numbers(5,7)

 # Function with input/output

def printhello( a, b ):

return a + b;

Recursive functions

def factorial(n):

    if n == 1:

        return 1

    else:

        return n * factorial(n-1)

factorial(5)

Function Arguments

Required arguments

Keyword arguments

Default arguments

Variable-length arguments