int incomingNum = 0;   
char incomingChar;

void setup()
{
  Serial.begin(9600); 
  Serial.println("Hello Arduino"); 
}

void loop()
{
  // if there are characters available, read and print them 
  if (Serial.available() > 0) 
  {
    incomingNum = Serial.read();
    incomingChar = incomingNum;
    Serial.println(Serial.available());
    Serial.println("Character Code");
    Serial.print(incomingChar);
    Serial.print(" ");
    Serial.println(incomingNum);
    Serial.print("Characters remaining: ");
    
  }
}