"find the sum of the series 1^2+3^2+5^2+...+n^2 using for loop" using c .

  //find the sum of the series 1^2+3^2+5^2+...+n^2  using for loop

 //where  n is the positive odd integer

 #include <stdio.h >

 int main ()

 {

    int n,i,sum ;

    printf ("enter any positive odd integer  i.e n :");

    scanf ("%i",&n);

for (i=1;i<=n;i=i+2){

    sum=sum + i*i;

}

printf ("the  sum of the series is :%i",sum);

return 0;

 }