Output : if u enter the limit 5. Then this will be added as 1+2+3+4+5.

#include<conio.h>

#include<stdio.h>

void main()

{   clrscr();

    int i,n,sum;

    printf("limit=");

    scanf("%d",&n);

    sum=0;

    i=1;

    while(i<=n)

    {  sum=sum+i;

       i++;

       }

       printf("%d",sum);

       getch();

       }