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

  int a = 5; // initial value of variable a
  int b = 8; // initial value of variable b

  a = a ^ b; // XOR operation to swap values

  b = a ^ b; // XOR operation to swap values

  a = a ^ b; // XOR operation to swap values

  // After execution, the values of a and b will be swapped
  Serial.print("a=");
  Serial.println(a);
  Serial.print("b=");
  Serial.print(b);

}

void loop() {
  // put your main code here, to run repeatedly:

}