Program to print the sum of 1st N natural numbers

What are Natural Numbers?

Natural numbers are positive integers starting from 1, 2, 3, and so on. The sum of the first N natural numbers can be calculated using a loop or using the formula:

Sum = n(n+1)/2

#include<stdio.h>
int main()
{
int n,i,sum=0;
printf("Enter the limit: ");
scanf("%d", &n);
for(i=1;i<=n;i++)
{
sum = sum +i;
}
printf("Sum of N natural numbers is: %d",sum);
}

Output
Enter the limit: 5
Sum of N natural numbers is 15

Explanation:

• The user is prompted to enter the value of N.

• A for loop runs from 1 to N.

• Each number is added to the sum variable.

• Finally, the total sum is displayed.