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.
Relatedkey
keyCode
keyPressed()
keyReleased()
Updated on January 1, 2021 03:38:09am EST