Simple multi-input tutorial for Processing beginners (ver 3.5.4)

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1

Many beginners and some intermediate coders have run into conflicting issues with using multiple key inputs for their sketches. keyCode and key are single-value variables that track the last key pressed. As such, they cannot store multiple sets of key data on their own.
Thus, I provide the following template:

/*number-indexed keys:*/
boolean[] keys;
void setup() {
  /*I use 1 key but you can modify length to include up to all 128 byte values*/
  keys = new boolean[1];
  for (int i = 0; i < keys.length; i++) {
    keys[i] = false;
  }
}

void draw() {
  if (keys[0]) {
    //statements
  }
}

void keyPressed() {
  if (key == CODED) {
    /*keyCode 37 used for demonstration*/
    if (keyCode = 37) {
      keys[0] = true;
    }
  }
}

void keyReleased() {
  if (key == CODED) {
    /*keyCode 37 used for demonstration*/
    if (keyCode = 37) {
      keys[0] = false;
    }
  }
}
2

the way I usually do it is by creating a char list[] of acceptable inputs and a boolean list if the key is pressed and wire things like

if(pressed[0]) {
    //do stuff
}
3

Studio.ProcessingTogether.com/sp/pad/export/ro.9cfU11egvzT6G