题解 | 阶乘
阶乘
https://www.nowcoder.com/practice/39fcf876fab34fe8afc298de10a1e112
总有人想用这个
function _factorial(number){
if (number==1){return 1}
else{
var num=1;
for(;number>=1;){
num=num*number;
number--;}
return num;}
}
