Feb 17, 2023 · Given a number n, find sum of first n natural numbers. To calculate the sum, we will use a recursive function recur_sum (). Below is code to find the sum of natural numbers up to n using recursion : Output : Time complexity : O (n) Auxiliary space : O (n)

In the program below, we've used a recursive function recur_sum() to compute the sum up to the given number. Source Code # Python program to find the sum of natural using recursive function def recur_sum(n): if n <= 1: return n else: return n + recur_sum(n-1) # change this value for a different result num = 16 if num < 0: print("Enter a ...

Nov 14, 2013 · def recursive_sum(n): return n if n <= 1 else n + recursive_sum(n-1) # Please change the number to test other scenarios. num = 100 if num < 0: print("Please enter a positive number") else: print("The sum is",recursive_sum(num))

Learn how to find the sum of natural numbers using recursion in Python with step-by-step examples and explanations.

Feb 6, 2025 · Learn how to find the sum of natural numbers in Python using a loop, recursion, and a mathematical formula.

Define a recursive function that computes the sum of the first N natural numbers. 2. Get the value of N from the user. 3. Call the recursive function and display the result. 3. Code Program.

Jul 4, 2023 · Here, we will discuss four different approaches to writing a Python Program to find the sum of first n natural numbers. Two natural numbers that follow one another have a difference of 1. The progression of natural numbers is an arithmetic progression since every pair of subsequent numbers has the same difference.

Apr 24, 2022 · The formula to find the sum of the first n natural number is n*(n+1)/2. Recursion process requires more space than iteration to find the sum of natural numbers. The Worst space complexity occurs in the recursion method to find the sum of n natural numbers.

Nov 3, 2022 · Sum of n natural numbers in python; In this tutorial, you will learn how do you write a Python program to find the sum of the first n natural number using while loop, for loop, and recursion function.

In this article, we will learn about how to write python program to find sum of N natural numbers using recursion. Getting Started. The task is to find the sum of N natural numbers using recursion. For example, If N = 10, then output should be 55 because sum of first N natural numbers in 55 i.e. 1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9 + 10 = 55.