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>
[Recommended learning: javascript advanced tutorial]
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