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JavaScript基础 20191021
阿乎乎的学习
Original
679 people have browsed it

实例

<!doctype html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport"
          content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>JS演示</title>
</head>
<body>
<script>
    // alert('弹窗提示');
    //使用var关键字来定义变量
    var name='小新';
    console.log('我的名字是'+name);
    //字符串类型
    console.log(typeof(name));
    //数组类型
    var name1=['小新','小白','小黑'];
    console.log(typeof(name1));
    console.log(name1);
    //对象
    var obj=new Object();
    console.log(obj);
    //数值类型
    var sum1=10;
    console.log(typeof(sum1));
    var sum2=5;
    var sum=sum1+sum2;
    console.log(sum1+'+'+sum2+'='+sum);
    //js表达式
    if(sum1<sum2){
        console.log(sum1+'比'+sum2+'小');
    }else{
        console.log(sum1+'不比'+sum2+'小');
    }
    //js定义函数的方法，
    function Sum(num1,num2){
        return num1*num2;
    }
    var num=Sum(10,20);
    console.log(num);

    var ls=function (num3,num4){
        return num3+num4;
    }
    console.log(ls(15,22));
</script>
</body>
</html>

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简单的学习了JavaScript的变量定义，数据类型，以及定义函数的方法

Correction status：qualified

Teacher's comments：js的基础并不多的, 多写多看一定能学会的
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