// search for target in array; return index if found
// return -1 if not found
public static int search(int[ ] a, int target) {
   int i;  // declared outside the loop

   for (i = 0; i < a.length && a[i] != target; i++) {
   }

   if (i == a.length) { // didn't find it
      return -1;
   } else {
      return i; // index for target
   }
}