- Processing
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- Processing.py
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- Processing Foundation

This reference is for Processing 3.0+. If you have a previous version, use the reference included with your software in the Help menu. If you see any errors or have suggestions, please let us know. If you prefer a more technical reference, visit the Processing Core Javadoc and Libraries Javadoc.

Name | ### keyPressed
Examples |
    // Click on the image to give it focus,
    // and then press any key.

    // Note: The rectangle in this example may
    // flicker as the operating system may
    // register a long key press as a repetition
    // of key presses.

    void draw() {
      if (keyPressed == true) {
        fill(0);
      } else {
        fill(255);
      }
      rect(25, 25, 50, 50);
    }
Description | The boolean system variable keyPressed is true if any key is pressed and false if no keys are pressed. Note that there is a similarly named function called keyPressed(). See its reference page for more information.
Related | key keyCode keyPressed() keyReleased()

Updated on July 4, 2018 11:56:44am EDT