Turbo C  Sum of 0 to N Numbers  n (n+1) / 2
Here is the Turbo C program for the sum of 0  N using the formula n (n+1) / 2.
Source Code
#include <stdio.h>
void main()
{
int N, sum = 0;
printf("Program for sum of all numbers from 0  N\n");
printf("Enter N: ");
scanf("%d", &N);
sum = N * (N+1) / 2;
printf("The sum of all numbers between 0 and %d is: %d", N, sum);
}
Output
Program for sum of all numbers from 0  N
Enter N: 100
The sum of all numbers between 0 and 100 is: 5050
