shell-5：case比if（elif else）方便

[root@a lmk]# cat case.sh #!/bin/bash read -p "tap a num to echo:" num case $num in 1) echo 1 ;; 2) echo 2 ;; 3) echo 3 ;; *) echo "other num" ;; esac [root@a lmk]# sh case.sh tap a num to echo:1 1 [root@a lmk]# sh case.sh tap a num to echo:4 other num [root@a lmk]#