int val = 0; 
 
void setup() { 
  attachInterrupt(0, myFunction, RISING); // set myFunction to be called everytime 
                                  // interrupt 0 is generated 
  Serial.begin(9600);             // Starts serial to print data 
} 
 
void loop() { 
  val = val + 1; 
  if(val > 10000) { 
    detachInterrupt(0); 
  } 
  delay(100); 
} 
 
void myFunction() { 
  Serial.print("hello "); 
}