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 · The sum of the first N natural numbers is calculated using the formula: \[S_N = \sum_{i=1}^{N} i = \frac{N (N + 1)}{2}\] For example, the sum of the first 5 natural numbers is: 1+2+3+4+5=15. In this tutorial, we will write a Python program to find the sum of natural numbers using loops, 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.

Dec 30, 2024 · To find the sum of the first n natural numbers using recursion, we use the following approach: If the number n is 0, return 0, as the sum of the first 0 natural numbers is 0. For any number n, the sum of the first n natural numbers can be found by adding n to the sum of the first n – 1 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.

Mar 22, 2024 · 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.

Dec 10, 2024 · One classic example is calculating the sum of natural numbers, where the sum of first n natural numbers is the sum of n plus the sum of numbers before n. In this article, you will learn how to harness recursion to compute the sum of natural numbers in Python.