JavaScript计算n的阶乘
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<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
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<script>
function jiecheng(n){
if(n==1){
return n
}else{
return(n*(n-1))
}
}
console.log(jiecheng(3))
</script>
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