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How to generate two random numbers in javascript

醉折花枝作酒筹Original: 2021-06-09 11:31:403426browse

Method to generate random numbers: First use the "random()" method to return a random number between 0 and 1, and then multiply the obtained random number by the specified number plus the specified number to obtain Random numbers within the specified range; finally use the "floor()" method to return the largest integer less than or equal to the specified interval.

The operating environment of this tutorial: windows7 system, javascript version 1.8.5, Dell G3 computer.

Use Math.floor() in combination with Math.random().

This simple line of code will return you a number between 1 and 6 (all inclusive):

Math.floor(Math.random() * 6 + 1)

There are 6 possible results here: 1, 2, 3, 4 ,5,6.

Extended information:

The random() method can return a random number between 0 ~ 1.

<html>
<body>

<script type="text/javascript">

document.write(Math.random())  //一个可能结果：0.3564017841844467

</script>

</body>
</html>

The floor() method returns the largest integer less than or equal to x. If the passed parameter is an integer, the value is unchanged.

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>document</title>
</head>
<body>

<p id="demo">单击按钮将不同的数值降到离它最近的整数。</p>
<button onclick="myFunction()">点我</button>
<script>
function myFunction(){
	var a=Math.floor(0.60);
	var b=Math.floor(0.40);
	var c=Math.floor(5);
	var d=Math.floor(5.1);
	var e=Math.floor(-5.1);
	var f=Math.floor(-5.9);
	var x=document.getElementById("demo");
	x.innerHTML=a + "<br>" + b + "<br>" + c + "<br>" + d + "<br>" + e + "<br>" + f; 
}
</script>

</body>
</html>

How to generate two random numbers in javascript

[Recommended learning: javascript advanced tutorial]

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