Exercise 4-6

 

#include <stdio.h>

 

int main() {

    int a,b,sum;

    sum=0;

    printf("enter the first number: ");

    scanf("%d",&a);

    printf("enter the second number: ");

    scanf("%d",&b);

    for (a;a<=b;a=a+1)

        sum=sum+a;

    printf("The sum is : %d",sum);

   

    return 0;

}