how to use LED with button

HOW WE USE LED WITH BUTTON

INTRODUCTION:

In this blog we discuss about how we use led with button.

Things Required:

• Arduino
• Breadboard
• Jumper wire
  
  
  
• LED
• Resistoer

CODE:

// constants won't change. They're used here to set pin numbers:

const int buttonPin = 8;     // the number of the pushbutton pin

const int ledPin =  9;      // the number of the LED pin

// variables will change:

int buttonState = 0;         // variable for reading the pushbutton status

void setup() {

  // initialize the LED pin as an output:

  pinMode(ledPin, OUTPUT);

  // initialize the pushbutton pin as an input:

  pinMode(buttonPin, INPUT);

}

void loop() {

  // read the state of the pushbutton value:

  buttonState = digitalRead(buttonPin);

  // check if the pushbutton is pressed. If it is, the buttonState is HIGH:

  if (buttonState == HIGH) {

    // turn LED on:

    digitalWrite(ledPin, HIGH);

  } else {

    // turn LED off:

    digitalWrite(ledPin, LOW);

  }

}