how to use recursive functions in python code example

Example 1: recursion in python

def rec(num):
    if num <= 1:
        return 1
    else:
        return num + rec(num - 1)

print(rec(50))

Example 2: python recursion example

# Recursive Factorial Example
# input: 5 
# output: 120 (5*4*3*2*1)
def factorial(x):
    if x == 1:
        return 1
    else:
        return (x * factorial(x-1))