lovecoding
/
VIP32


			
				
					
						
						
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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>
        var arr = new Array();
        var obj = new Object();
        var date = new Date();
        var num = new Number();
        var str = new String();
        var aaa = new Boolean()
        console.log(aaa);
        var b = 3.1415926;
        //parseInt（） 整数
        // parseFloat() 浮点数
        console.log(parseInt(b));
        console.log(parseFloat(b));
    </script>
</body>
</html>