void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
}

// The addition function takes two integers as arguments 
// and returns their sum as an integer.
int addition(int x, int y) {
  return x + y;
}


void loop() {
  int firstNumber = 3;
  int secondNumber = 4;
  
  // storing the result of addition in a variable
  int result = addition(firstNumber, secondNumber);

  Serial.println("Demonstrating Function Usage:");
  Serial.print("Adding ");
  Serial.print(firstNumber);
  Serial.print(" and ");
  Serial.print(secondNumber);
  Serial.print(" using a variable: ");
  Serial.println(result);

  // directly printing the result of the addition function
  Serial.print("Adding directly without a variable: ");
  Serial.println(addition(firstNumber, secondNumber));

  delay(10000);
}