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.

Jul 2, 2024 · In this example, a Python function sum_of_natural_numbers is defined to calculate the sum of the first N natural numbers using a while loop. The function initializes variables total and count, iterates through the numbers from 1 to N, and accumulates the sum in …

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 .

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 below formula. Sum of first n natural numbers = (n * (n+1)) / 2. How does this work? We can prove this formula using induction. Let it be true for k = n-1.

In this tutorial, we are going to write a program to find the sum of the first n natural numbers using a while loop. In mathematics, the sum of the first n natural numbers is given by the formula n(n+1)/2.

Jun 9, 2018 · In this tutorial, we will write a simple Python program to calculate the sum of first n natural numbers. In this program we are not using the natural number addition formula n (n+1)/2, instead we are adding the natural numbers using while loop.

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 code is the sum of all the natural numbers until the given value.

May 30, 2023 · Approaches To Find The Sum of First N Natural Numbers. Here, we will discuss four different approaches to writing a Python Program to find the sum of first n natural numbers. Approach 1: Python Program to find the sum of first n natural numbers Using Formula. Two natural numbers that follow one another have a difference of 1.

Nov 22, 2021 · with a while loop the sum of natural numbers up to num. num = 20 sum_of_numbers = 0 while(num > 0): sum_of_numbers += num num -= 1 print("The sum is", sum_of_numbers)

In this Python tutorial, you'll learn how to calculate the sum of the first N natural numbers using a while loop. Instead of using the direct mathematical fo...