import{_ as s}from"./plugin-vue_export-helper-DlAUqK2U.js";import{c as a,a as t,o as h}from"./app-zNUiodpH.js";const n={};function l(k,i){return h(),a("div",null,[...i[0]||(i[0]=[t(`

JavaScript基本语法

变量

声明变量

var a = 1;

JavaScript有如下基本的变量类型Number, String, Boolean, Undefined, Null

var a=1;		//Number
var b="hello";	//String\`
var c=true;		//Boolean
var d;			//Undefined\`
var e=null;		//Null

JavaScript 是一种动态类型语言，也就是说，变量的类型没有限制，变量可以随时更改类型。

var a=1;
a="hello";

流程控制

条件(if...else 结构)

if (m === 0) 
{  
	// ...
} 
else if (m === 1) { 
 // ...
} 
else if (m === 2) {  
// ...
} 
else {  // ... }

switch 结构

switch (fruit) {  
case "banana":
	{
		//...
	}
    break;  
case "apple": 
    break;  
default:
}

循环

while循环

while(condition) {
	//do something
}

do {
	//do something
}while(condition)

for循环

for (var i = 0; i < 3; i++) {  
	console.log(i); // 0 1 2 
}

和c++一样，continue和break在循环体中起到同样作用

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