const int LED=10; 
const int BUTTON=2; 
void setup() { 
 // put your setup code here, to run once: 
 pinMode(LED, OUTPUT); 
 pinMode(BUTTON, INPUT); 
} 
 
void loop() { 
 // put your main code here, to run repeatedly: 
 if (digitalRead(BUTTON) == LOW) 
 { 
 digitalWrite(LED, LOW); 
 } 
 else 
 { 
 digitalWrite(LED, HIGH); 
 } 
}