WAP for the following series.

1^2 - 3^2 + 5^2 - 7^2 + - - - - -  - - -  +101^2

CODE ::

#include <stdio.h>
int main ()
{
    int i,sum=0,sign=1;
    for(i=1;i<=101;i=i+2)
    {
        sum=sum+(i*i)*(sign);
        sign=sign*(-1);
    }
    printf("Sum is %d",sum);
    return 0;
}