InsideRectangle Boolean Function

Here is an example of a function that returns a boolean, as opposed to a 'void' function. The insideRect() function returns true or false if a point is inside a rectangle.

void setup() {
  size(300, 300);
}


void draw() {

  background(120);

  int rectX = 30;
  int rectY = 40;
  int rectHeight = 50;
  int rectWidth = 50;

  if (insideRect(mouseX, mouseY, rectX, rectY, rectHeight, rectWidth)) {
    fill(255);
  }
  else {
    fill(120);
  }

  rect (rectX, rectY, rectHeight, rectWidth);
  
}

// boolean function returns either true or false
boolean insideRect(float px, float py, float rx, float ry, float rw, float rh) {
  return px >= rx && px <= rx+rw && py >= ry && py <= ry+rh;
}