for loop sum

#include<stdio.h>
int main()
{
    int i,a,b,sum=0,count=0;
    double avg;
    scanf("%d %d",&a, &b);
    i=a;
    while(i<=b)
    {
        sum=sum+i;
        count++;
        avg=sum/count;
        i++;
    }
    printf ("sum is %d \n avg is %lf",sum,avg);
    return 0;
}