#define ACTIVATED LOW 
int led = 10;
int button = 9;
int buttonvalue ;
void setup() {
  // put your setup code here, to run once:
 Serial.begin(9600);
 pinMode(led, OUTPUT);
 pinMode(button, INPUT);
 digitalWrite(button,HIGH);
}

void loop() {
  // put your main code here, to run repeatedly:
 buttonvalue = digitalRead(button);
 if (buttonvalue == ACTIVATED)
 {
   digitalWrite(led, HIGH);
 }
 else 
 {
   digitalWrite(led, LOW);
 }
}