How to write program for arduino

1. Frist install arduino into your machine. After installation done open arduino IDE.

2. Create new file in arduino IDE. Let's we make blink program into arduino.

    // Blink program for arduino microcontroller

void setup(void) {
  pinMode(13, OUTPUT);
}

void loop() {
  digitalWrite(13, LOW);
  delay(1000);
  digitalWrite(13, HIGH);
  delay(1000);
}

3. Save file and connect your arduino micro controller with machine.

4. Select board Tools > Board > Select Arduino board

5. Upload program check IDE bottom it will show your program upload successfully or error in your program.

6. After complete it check your arduino board.