P5.js random rounding test; I'm comparing JavaScript rounding functions in P5 to prove that ceil and floor will omit one pissibility.

p5-round.js

function evaluate(callback, from, to, count) {
	var results = {};
	
	for (var i = 0; i < count; i++) {
		var result = callback(from, to);
		results[result] = results[result] ? results[result] + 1 : 1;
	}
	
	return results;
}

function setup() {
	print(evaluate(function(from, to) {
		return round(random(from, to));
	}, 1, 4, 1000));
	print(evaluate(function(from, to) {
		return floor(random(from, to));
	}, 1, 4, 1000));
	print(evaluate(function(from, to) {
		return ceil(random(from, to));
	}, 1, 4, 1000));
} 

function draw() { 
  noLoop();
}