JavaScript - Zufallszahlen

Quelle: https://wiki.selfhtml.org/wiki/JavaScript/Anwendung_und_Praxis/Zufallszahlen (2017-03)

var min = 5;
var max = 10;
var x = Math.floor(Math.random() * (max - min + 1)) + min;

Beispiel

var test = {
	results : {
		mathfloor : [],
		mathround : []
	},
	min : 5,
	max : 10,
	iterations : 120000,
	drawings : 0,
	randFloor : function () {
		return Math.floor(Math.random() * (test.max - test.min + 1)) + test.min;
	},
	randRound : function () {
		return Math.round(Math.random() * (test.max - test.min)) + test.min;
	},
	start : function (button) {
		for (var i = 0; i < test.iterations; i++) {
			test.save("mathfloor", test.randFloor());
			test.save("mathround", test.randRound());
		}
		test.drawings += test.iterations;
		test.report();
	},
	save : function (type, n) {
		var resultArray = test.results[type];
		if (typeof resultArray[n] == "number") {
			resultArray[n]++;
		} else {
			resultArray[n] = 1;
		}
	},
	report : function () {
		var tbody = document.getElementById("ausgabe");
		var child = tbody.firstChild;
		for (var i = tbody.childNodes.length - 1, child; i >= 0; i--) {
			tbody.removeChild(tbody.childNodes[i]);
		}
		var html = "";
		for (var i = test.min; i <= test.max; i++) {
			var nRound = test.results.mathround[i];
			var pRound = (nRound / test.drawings).toString().substr(0, 6);
			var nFloor = test.results.mathfloor[i];
			var pFloor = (nFloor / test.drawings).toString().substr(0, 6);
			var row = tbody.insertRow(-1);
			(row.insertCell(-1)).appendChild(document.createTextNode(i));
			(row.insertCell(-1)).appendChild(document.createTextNode(nRound));
			(row.insertCell(-1)).appendChild(document.createTextNode(pRound));
			(row.insertCell(-1)).appendChild(document.createTextNode(nFloor));
			(row.insertCell(-1)).appendChild(document.createTextNode(pFloor));
		}
	}
  };