例子_函数实现n阶乘

"Hello World, Hello Blog"

Posted by wudimingwo on December 15, 2018

版本1.0

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var fun = (function() {

        return function(n) {
          var num = 1;
          for(var i = 1;i <= n;i++) {
            num *= i;
          }
          return num
        }
      })();