html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>5个数字最大数是:</title>
</head>
<body>
<h2>5个数字中最大数字是:</h2>
<script src="./1.JS"></script>
</body>
</html>
js
A = +prompt('请输入一个数字')
B = +prompt('请输入二个数字')
C = +prompt('请输入三个数字')
D = +prompt('请输入四个数字')
E = +prompt('请输入五个数字')
var max=Math.max(A,B,C,D,E)
console.log(max);
document.write(max)
var max1=Math.max.apply(this,[A,B,C,D,E]);