// Adding two numbers together

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

void loop() {
  if (Serial.available() > 0) {
    // Read the first number
    Serial.println("Enter the first number:");
    while (Serial.available() == 0) {} // checks if any data has been sent to the Arduino from the Serial Monitor. If data is available, the code inside the if statement will execute.
    int num1 = Serial.parseInt();  // reads the next available integer number from the Serial Monitor, which the user types in.

    // Read the second number
    (Serial.available() > 0);
    Serial.println("Enter the second number:");
    while (Serial.available() == 0) {} // enter data
    int num2 = Serial.parseInt(); // second number

    // Add the two numbers
    int sum = num1 + num2;

    // Print the result - processing outputs
    Serial.print("The sum of ");
    Serial.print(num1);
    Serial.print(" and ");
    Serial.print(num2);
    Serial.print(" is ");
    Serial.println(sum);
    
    // delay for output
    delay(8000);

  }
}