This reference is for Processing 2.0+. If you have a previous version, use the reference included with your software. If you see any errors or have suggestions, please let us know. If you prefer a more technical reference, visit the Processing 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 May 19, 2014 05:29:59pm PDT