Write a C program to find sum of all natural numbers between 1 to n

Find sum of all natural numbers between 1 to n

Sample Output

Enter a number: 6

Natural numbers are...

1

2

3

4

5

6

Sum: 21

Process returned 0 (0x0)   execution time : 11.998 s
Press any key to continue.

Source Code

#include<stdio.h>
 
int main()
{
    int n, num, sum = 0;
 
    printf("Enter a number: ");
    scanf("%d", &num);
 
    printf("\nNatural numbers are...\n");
 
    for(n = 1; n <= num; n++)
    {
        sum += n; // Or, sum = sum + n;
 
        printf("\n%d\n", n);
    }
    printf("\nSum: %d\n", sum);
 
    return 0;
}

Sample Output

Enter a number: 6

Natural numbers are...

1

2

3

4

5

6

Sum: 21

Process returned 0 (0x0)   execution time : 11.998 s
Press any key to continue.