To understand this example, you should have the knowledge of following Python programming topics:
In the program below, we've used a recursive function
recur_sum() to compute the sum up to the given number.
# Python program to find the sum of natural numbers up to n using recursive function def recur_sum(n): """Function to return the sum of natural numbers using recursion""" if n <= 1: return n else: return n + recur_sum(n-1) # change this value for a different result num = 16 # uncomment to take input from the user #num = int(input("Enter a number: ")) if num < 0: print("Enter a positive number") else: print("The sum is",recur_sum(num))
The sum is 136
Note: To test the program, change the value of
num. Try negative numbers as well.