- Processing
- p5.js
- Processing.py
- Processing for Android
- Processing for Pi

- 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 | ### loop()
Examples |
    void setup() {
      size(200, 200);
      noLoop();  // draw() will not loop
    }

    float x = 0;

    void draw() {
      background(204);
      x = x + .1;
      if (x > width) {
        x = 0;
      }
      line(x, 0, x, height);
    }

    void mousePressed() {
      loop();  // Holding down the mouse activates looping
    }

    void mouseReleased() {
      noLoop();  // Releasing the mouse stops looping draw()
    }
Description | By default, Processing loops through draw() continuously, executing the code within it. However, the draw() loop may be stopped by calling noLoop(). In that case, the draw() loop can be resumed with loop().
Syntax |
    loop()
Returns | void
Related | noLoop() redraw() draw()

Updated on January 9, 2020 00:33:08pm EST