怎么把case循环转化为if循环？

日复一日王

1. #!/bin/bash
   
2. read -p "press some key ,then press return :" KEY
   
3. case $KEY in
   
4. [a-z]|[A-Z])
   
5. echo "It's a letter."
   
6. ;;
   
7. [0-9])
   
8. echo "It's a digit."
   
9. ;;
   
10. *)
    
11. echo "It's function keys、Spacebar or other ksys."
    
12. esac

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以上的脚本怎么用if循环表现出来？求大神答疑解惑！

howandsen

1. if [[ "$1" =~ [:alpha:] ]]; then
   
2.         echo letter
   
3. elif [[ "$1" =~ [0-9] ]]; then
   
4.                 echo digit
   
5.         else
   
6.                 echo other
   
7. fi

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if不是循环

liion631818

if [[ $KEY =~ "[a-z]" ]]; then

elif  [[ $KEY =~ "[0-9]" ]]; then

...
fi

日复一日王

回复 2# howandsen

感谢感谢！


   

日复一日王

回复 3# liion631818
perfect！