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## pinMode(pin, mode)

#### Description

Configures the specified pin to behave either as an input or an output. See the reference page below.

#### Parameters

pin: the number of the pin whose mode you wish to set. (int)

mode: either INPUT or OUTPUT.

#### Returns

None

#### Example

    int ledPin = 13;                 // LED connected to digital pin 13

    void setup()
    {
      pinMode(ledPin, OUTPUT);      // sets the digital pin as output
    }

    void loop()
    {
      digitalWrite(ledPin, HIGH);   // sets the LED on
      delay(1000);                  // waits for a second
      digitalWrite(ledPin, LOW);    // sets the LED off
      delay(1000);                  // waits for a second
    }

#### Note

The analog input pins can be used as digital pins, referred to as numbers 14 (analog input 0) to 19 (analog input 5).

#### See also

- Description of the pins on an Arduino board
- constants
- digitalWrite
- digitalRead

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The text of the Arduino reference is licensed under a Creative Commons Attribution-ShareAlike 3.0 License. Code samples in the reference are released into the public domain.

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