DOM - 4数据类型转换 - 《爆炸就是java》

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>数据类型转换</title>
    <script type="text/javascript">
        //字符串转换为整数类型
        var str1 = "89";
        var number1 = parseInt(str1);
        alert(number1 + ",类型：" + typeof(number1));
        //字符串里有非数值的值（英文字符），只会转换数字的值
        var str2 = "89ajdk89ladj";
        var number2 = parseInt(str2);
        alert(number2 + ",类型：" + typeof(number2));
        //字符串转换为 浮点类型
        var str3 = "78.01";
        var float1 = parseFloat(str3);
        alert(float1 + "，类型：" + typeof(float1));
        //数字转换为String类型
        var num1 = 55;
        var toString1 = num1.toString();
        alert(toString1 + "，类型：" + typeof(toString1));
        //String类型转换Boolean
         var strTrue = "true";
         var flag = Boolean(strTrue);
         alert(flag + "，类型：" + typeof(flag));
    </script>
</head>
<body>
</body>
</html>