Linux Shell 分支語句

Linux Shell 分支語句：

1. #!/bin/sh
2. # test
3. echo -n "are you sure to delete these files?"
4. read ANS
5. case $ANS in
6. y|Y|yes|Yes)
7. rm a.txt
8. ;;
9. n|N|no|No)
10. exit 0
11. ;;
12. esac