training day 5

                                  Functions in Python

Functions in python consists of two parts : Calling and definition. Here def keyword is used to define the function . 

Example :

def one( ):                                                 #definition

   print("Hello")

one( )                                                         #calling

Example :

def one(last):

  print(last + "Kaur")

one("Jaspreet")

one("Parneet")

Parameter with default value :

Example : 

 def one(first = ''Jaspreet'')

     print(first + "kaur")

one("Puneet")

one()

Parameter passing in the form of list 

Example :

def check_fruits(fruits):

   for x in fruits:

      print(x)

fruits = ["apple","banana'',"cherries"]

check_fruits(fruits)

Returning

Example :

def multiply(n):

    return 5*n

print(multiply(2))

print(multiply(3))

print(multiply(4))

Recursion

Program for factorial of number using recursion

n = int(input("Enter any number"))

def factorial(n):

    if n == 0:

        return 1;

    else:

       return n*(factorial(factorial(n-1))

print(factorial(n))