tryjsref_log2 在线代码实例

实例代码( Tip: 登录后体验更佳 )
运行代码

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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>W3Cschool教程(w3cschool.cn)</title>
</head>
<body>
<p id="demo">单击按钮显示不同数值的自然对数。</p>
<button onclick="myFunction()">点我</button>
<script>
function myFunction(){
    var a=Math.log(2.7183);
    var b=Math.log(2);
    var c=Math.log(1);
    var d=Math.log(0);
    var e=Math.log(-1);
    var x=document.getElementById("demo");
    x.innerHTML=a + "<br>" + b + "<br>" + c + "<br>" + d + "<br>" + e
}
</script>
</body>
</html>
 
 
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运行结果
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