void setup()
{
 // Start serial communication for Uno R3
 Serial.begin(9600); //Start serial communication for Arduino Mega at Serial port 3
}
void loop() {
 Serial.print("Hello World!\n");
 Serial.print("17\n");
 Serial.print("3.14159265359\n");
 Serial.print(25);
 Serial.print("\n"); // Outputs the ASCII string "25" to the serial port
 Serial.print(2.7345); // Outputs "2.73"
 delay(1000);
}