syntax error near unexpected token `elif' 是怎么回事

feigepp

#!/bin/bash
if [ "X$force" = "X1" ]; then
elif [ "X$force" = "X2" ]; then
elif [ "X$force" = "X3" ]; then
else
fi

一运行就出现
tmp.sh: line 3: syntax error near unexpected token `elif'
tmp.sh: line 3: `elif [ "X$force" = "X2" ]; then '

Shell_HAT

1. 
   
2. #!/bin/bash
   
3. if [ "X$force" = "X1" ]; then
   
4.     echo 1
   
5. elif [ "X$force" = "X2" ]; then
   
6.     echo 2
   
7. elif [ "X$force" = "X3" ]; then
   
8.     echo 3
   
9. else
   
10.     echo 4
    
11. fi
    

复制代码

feigepp

回复 2# Shell_HAT


    谢谢，能不能指明我哪个地方错了呢？

Shell_HAT

回复 3# feigepp


语法错了
条件后面应该有点动作才对

feigepp

回复 4# Shell_HAT


    原来如此
   那如果我不想执行任何动作，可以用什么语句表示一个空的动作？

kwokcn

:;

elif和else行的最后加上这个。

Shell_HAT

回复 5# feigepp

1. 
   
2. #!/bin/bash
   
3. if [ "X$force" = "X1" ]; then
   
4.     :
   
5. elif [ "X$force" = "X2" ]; then
   
6.     :
   
7. elif [ "X$force" = "X3" ]; then
   
8.     :
   
9. else
   
10.     :
    
11. fi
    

复制代码

feigepp

回复 6# kwokcn


    受教了，thanks

coofei

mark

mir620

学习了