p5.js Random Numbers

Random numbers are often used in programming and can be found everywhere from encrypting data to generative design. In p5js there's a simple function to get a random number:

random( [lower limit], [upper limit] )

function setup()
{
  createCanvas(500,500);
  background(255);
  fill(255);
  stroke(0);
}
   
function draw()
{
  fill(random(100,150), random(0,100), random(150,255)); //random color
  var size = random(10, 100); // random size
  ellipse(random(0, width), random(0, height), size, size); //random eclipse size and position
}