int Ledpin =5;
int button =15;
int val;// Define the variable value
void setup()
{
  pinMode(Ledpin, OUTPUT);// define LED as output
  pinMode(button, INPUT);// define button as input
}
void loop()
{
  val = digitalRead(button);//Read digital pin 5 level value assign
  if (val==1)// Test button is pressed
  {
    digitalWrite( Ledpin, HIGH);
  }
  else
  {
    digitalWrite(Ledpin, LOW);
  }
}