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JavaScript初步入门

大写函数:".toUpperCase();"

"My name is hheehehehh".toUpperCase();

PS:比C++容易多了!!!

输入输出样例:

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布尔运算符(判断真假)如:

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具体代码如下:

var isWeekend = true;
var needToShowerToday = !isWeekend;
needToShowerToday;

为数组加入元素:

var animals = [];
animals.push("cat");
animals.push("Snake");
animals.push("lynx");
animals;

运行结果如下:

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从数组中删除元素:

var animals = [];
animals.push("cat");
animals.push("Snake");
animals.push("lynx");
animals;
animals.pop();
"lynx";
animals;

猜猜结果会是什么呢?
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链接字符串:

var animals_1 = ["lynx","lamprey"];
var animals_2 = ["cat","dog","pig"];
var animals_3 = [];
var animals_3 = animals_1.concat(animals_2);
animals_3;

输出结果:
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prompt提示框:

prompt("请输入你想说的话:");

在数组中寻找元素:(indexOf函数)

var animals_1 = ["lynx","lamprey"];
var animals_2 = ["cat","dog","pig"];
var animals_3 = [];
var animals_3 = animals_1.concat(animals_2);
animals_3;
animals_3.indexOf("cat");

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输出错误会显示“-1”。

JS中的对象:(还有alert警告框函数)

var octopus = {};
    octopus.legs = "8";
    octopus.eyes = "2";
    octopus.head = "1";
alert("章鱼有" + octopus.legs + "条腿");

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JavaScript初步入门