How do i use the case statements in bash shell scripts?

vaquitasos

Case statements are another type of conditional based on the expression.

The structure is:

case expression in 
 option1)  
  action 
 ;; 
 option2) 
  action 
 ;; 
 *) 
  action
 ;; 
esac

Let's put it into action! The ;; is the end of action terminator. The * matches anything other than the options.

$ cat caseofwine.sh 
case "$1" in
wine)
  echo "Have you tried our new vintage!"
  ;;
beer)
  echo "Let's have a knees up!"
  ;;
*)
  echo "Sorry, the party has been cancelled!"
  ;;
esac

Running the script.

$ ./caseofwine.sh beer
Let's have a knees up!
$ ./caseofwine.sh wine
Have you tried our new vintage!
$ ./caseofwine.sh
Sorry party has been cancelled!