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teaching/wanzhaoyi/js/hanshu.html
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teaching/wanzhaoyi/js/hanshu.html
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<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="UTF-8">
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<meta http-equiv="X-UA-Compatible" content="IE=edge">
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<title>Document</title>
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<script>
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// 创建一个函数
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function add(x,y){
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return x+y
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}
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// 2 函数表达式
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// x,y ===> 形参
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var add=function (x,y){
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console.log(arguments.length) //函数参数的个数
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console.log(arguments.callee)
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return x+y
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}
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// add(1,1)
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// add // => 函数体
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// add(1,2) // => 函数执行 并返回执行结果(返回值)
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// 1,2 是add函数的实参
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// 立即执行函数
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(function (e){
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console.log("我是匿名函数啦啦啦啦啦啦")
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}(34))
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// 立即执行函数 的执行括号加在里面!!!!!
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</script>
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</head>
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<body>
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</body>
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</html>
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