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- <!DOCTYPE html>
- <html lang="en">
- <head>
- <meta charset="UTF-8">
- <meta name="viewport" content="width=device-width, initial-scale=1.0">
- <title>Document</title>
- </head>
- <body>
- <script>
- document.write(Math.E + '<br>'); // Math.PI 常量
- console.log(Math.abs(-10)); // Math.abs 绝对值
- console.log(Math.ceil(10.5)); // Math.ceil 向上取整
- console.log(Math.floor(10.5)); // Math.floor 向下取整
- console.log(Math.round(10.2)); // Math.round 四舍五入
- console.log(Math.random()*10); // Math.random 随机数
- // 随机取整x-y Math.round(Math.random() * (y-x) + x)
- console.log(Math.round(Math.random()*5+5));
- console.log(Math.pow(2,3)); //Math.pow(x,y) x的y次幂
- console.log(Math.sqrt(81)); // Math.sqrt 算术平方根
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- </script>
- </body>
- </html>
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