WAP for the following series.

1-3+5-7+9-11+ --------------------+101


CODE  ::

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