int calculateArea(int length, int width)  // this is not a "void" because we are returning a value of type integer
{
  return length * width;
}


void setup() { // void is a function that runs a program
  Serial.begin(9600);

}

void loop() {
  int lengthMeasure = 10;
  int widthMeasure = 5; 

  int area = calculateArea(lengthMeasure,widthMeasure); // we are calling the function and sending the two values with it

  Serial.print("The area of the rectangle is: ");
  Serial.print(area);
  Serial.println("   ");
  delay(1000);
}