Function to find the index of a value in an array

void setup() {
  int []ArrayEx = { 3, 4, 5};
  Check(3, ArrayEx,"ArrayEx");
  Check(6, ArrayEx,"ArrayEx");
}
void Check(int a, int []b, String c) {
  boolean Tof = false;
  for (int i = 0; i<b.length; i++) {
    if (b[i]==a) {
      Tof = true;
      println(a + " has index = " + i + " in " + c);
    }
  }
  if (Tof == false) {
    println(a + " is not in " + c);
  }
}