1 <!DOCTYPE html> 2 <html> 3 <head> 4 <meta charset="UTF-8"> 5 <title>uvi</title> 6 <link rel="stylesheet" href="style.css" type="text/css"> 7 </head> 8 <body> 9 <script> 10 document.write(Math.round(2.5)+"<br/>");//四舍五入=3 11 document.write(parseInt(Math.random()*10)+"<br/>");//从0到10 12 document.write(Math.max(10,20,4,1)+"<br/>");//最大值 13 document.write(Math.min(10,20,4,1)+"<br/>");//最小值 14 document.write(Math.abs(-10)+"<br/>");//绝对值 15 </script> 16 17 </body> 18 </html>