How to build the Constrain()-function

void setup() {
  Serial.begin(9600);
}

void loop() {
  Serial.println(my_constrainer(-300, -200, 200));
  Serial.println(my_constrainer(-200, -200, 200));
  Serial.println(my_constrainer(-150, -200, 200));
  Serial.println(my_constrainer(-100, -200, 200));
  Serial.println(my_constrainer(-50, -200, 200));
  Serial.println(my_constrainer(0, -200, 200));
  Serial.println(my_constrainer(50, -200, 200));
  Serial.println(my_constrainer(100, -200, 200));
  Serial.println(my_constrainer(150, -200, 200));
  Serial.println(my_constrainer(200, -200, 200));
  Serial.println(my_constrainer(300, -200, 200));
}

int my_constrainer(int val, int minimum, int maximum) {
  if (val > maximum) {
    val = maximum;
  }
  else if (val < minimum) {
    val = minimum;
  }
  return val;
}