Processing Sketch with a basic structure for learning purposes.

processing_basics.pde

//
//  processing_basics.pde
//
//  Processing sketch with a basic structure for learning purposes.
//
//  Created by Raphael Schaad on 2016-01-23.
//  This is free and unencumbered software released into the public domain.
//

// Define global vars/consts (all typed), and import libs
final int x = 0;
float[] y = {0.0, 1.0};
String[][] z = {{"he", "ll", "o"}, {"wo", "rl", "d"}};

// Set size(w, h) or pixelDensity() with vars
void settings() {
  // Must be first line in settings(), if used, otherwise first line in setup(). Defaults to 100,100 with a light gray background().
  size(300, 300);
  // System vars set by screen()
  println("canvas width: " + width + ", height: " + height);

  // Must be in settings(), if used. Enable retina (2x). Doesn't change displayed window size, just its resolution.
  pixelDensity(displayDensity());
}

// Code runs once
void setup() {
  for (int i = 0; i < z.length; i++) {
    for (int j = 0; j < z[i].length; j++) {
      println(z[i][j]);
    }
  }
  
  // Processing expects external resources by default in a per-sketch ./data folder
  println(dataPath(""));

  // Only draw() once. If used in setup(), should be final line. Revert with loop().
  noLoop();
}

// Code repeats
void draw() {
  // 1..max int
  println(frameCount);
  // close to 60, if nothing stalls; can be changed with frameRate(float)
  println(frameRate);
}