递归阶乘脚本

方法一：

for 循环：

#!bin/bash
 read -p "Num:"num

result=1
for i in `seq $num`
do
   result=$[ $result * $i ]
  
done

echo "the result is $result"

程序运行过程；

方法二：用函数来写

 #/bin/bash
  2 read -p "Num: " num
  3         d=1
  4 
  5 
  6 function fun1(){
  7         d=$[ $d * $i]
  8 }
  9 
 10         for i in `seq $num`
 11         do
 12         fun1
 13         done
 14         echo $d
 15