Serial.print array displays nothing

Question

I tried Serial.print an array I had made, but the Arduino displays nothing in the monitor.

I tried doing Serial.print("Hehehe"); as a test, but it just displayed "h?h?h?".

The monitor works fine with other sketches than this one.

Anyone knows why?

int my_array[10];

void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);

  for (int i = 0; i < 10; i++){
    my_array[i] = i * 5;

  }
}

void loop() {
  // put your main code here, to run repeatedly:
    for (int i = 0; i < 10; i++){
      Serial.print(my_array[i]);
      Serial.print(" ");
    }
    Serial.println();
    delay(1000);
}

Answer 1

Test on my Arduino Uno, your code works fine with a simple copy-paste. Remember to set the proper baud rate.