31 lines
692 B
HTML
31 lines
692 B
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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</head>
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<body>
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</body>
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<script>
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// 案例：取出小于50的数每个数乘以平方进行求平均值
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list=[]
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let count=0
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for(let i=0;i<100;i++){
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let maths=Math.ceil(Math.random()*10+1)
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list.push(maths)
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}
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let result=list.filter(function(n){
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return n<100//条件
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}).map(function(n){
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count=count+1
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return n/2 ;;//运算
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}).reduce(function(pre,n){
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return pre+n//汇总
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},0)
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console.log(result);
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</script>
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</html>
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