Display sum of first n positive nos.

#include<stdio.h>

#include<conio.h>

void main()

{

        int i, n, sum=0;

        clrscr();

printf(“Enter total no. to sum : ”);

scanf(“%d”, &n);

for(i=1;i<=n;i++)

{

                sum=sum+i;

}

printf(“Sum of first %d nos. is %d”, n,sum);

getch();

}

OUTPUT :

Enter total no. to sum : 10

Sum of first 10 nos. is 55