Arduino C++
void setup() {
  // put your setup code here, to run once:
  pinMode(26, OUTPUT); //Stablish pin 26 as output
  pinMode(27, INPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
  int status=digitalRead(27); // Read Button and save value on a int variable 

  if( status==HIGH)
  {
    digitalWrite(26,HIGH);
  }
  else{
      digitalWrite(26, LOW);  //Turn off LED on pin 26
  }

}