Learn how to calculate the sum of the first N natural numbers in Python. This tutorial explores different methods, including loops and formulas, along with input validation.

Jun 16, 2021 · In this lesson, you will learn how to calculate the sum and average of the first n natural numbers in Python. Also, you will get to know how to calculate the addition and …

Mar 7, 2025 · Given a number n, find the sum of the first n natural numbers. Examples : Calculate the sum of all integers from 1 to n by iterating through a loop. An efficient solution is to use the …

Here is a simple Python program that calculates the sum of n numbers using a for loop. sum += i. Let’s break down the code and understand how it works: We start by taking input from the user …

Write a function to find the sum of first N natural numbers. Hint : The formula for the sum of the first N natural numbers is N*(N+1)/2 . For example, for input 5 , the outout should be 15 .

This algorithm uses the formula n(n+1)/2 that can be used to find sum of first N natural numbers. This also reduces the time complexity from O(n) to O(1). The output for the above mentioned …

Write a Python Program to find the Sum of N Natural Numbers using While Loop, For Loop, Functions, and recursion with an example. To achieve the same, we need a loop to iterate the …

Dec 22, 2021 · Here’s an example of how you can calculate the sum of the first n numbers using a for loop in Python: # Input the value of n n = int(input("Enter a positive integer: ")) # Initialize …

Here is a Python program to find the sum of first n natural numbers using while loop with detailed explanations and output.

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: …