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

void loop() {

  //call the function
  //store result
  int result=multiply(16,15);
  Serial.println(result);
  //delay so that fuction excutes completely
  delay(100);
  exit(0); //exit loop

}
//multiply function 
//takes two variabes and results 
//their product
int multiply(int a,int b){
  return a*b;
}