Sum of 1 to 100 of using “while” loop:

#include<stdio.h>

#include<conio.h>

void main()

{

int s,i;

clrscr();

printf("input values::");

scanf("%d",&s);

i=1;

do

{

s=s+i;

i=i+1;

}while(i<=100);

printf("result=%d",s);

getch();

}