29 lines
567 B
HTML
29 lines
567 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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<script>
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function a(n) {
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if (n <= 1) {
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return 1
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} else {
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return n * a(n - 1)
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}
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}
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console.log(a(5)) //120
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var cheng=a
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a=null
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console.log(cheng(5))// : a is not a function
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</script>
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</body>
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</html>
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