Function in Python

Functions in Python:

·         A function is a organized and reusable block of code which run when it called. In this you can pass data which is known as parameter into the function.

·         For creating a function use def keyword, for example:

def function_name ( )

            print(“ Hello function1”)

·         For example:

1.      To find the factorial of given number using function in Python.

def factorial(n):

    if n == 0:

        return 1

    else:

        return n * factorial(n-1)

n=int(input("Input a number to compute the factorial : "))

print(factorial(n))

                        

                         It display following output:

                         Input a number to compute the factorial : 4

                         24

2.      To find the Fibonacci series of given number using function in Python.

def fibonacci(n):

    if(n <= 1):

        return n

    else:

        return(fibonacci(n-1) + fibonacci(n-2))

n = int(input("Enter number of terms:"))

print("Fibonacci sequence:")

for i in range(n):

    print(fibonacci(i))

                              It display following output:

                               Enter number of terms: 5

                               Fibonacci sequence:

0

1

1

2

3