General
- it's a good way to deal with user input
Syntax
case variable in
pattern [ | pattern] ...) statements;;
pattern [ | pattern] ...) statements;;
...
esac
Examples
echo "Is it morning? Please answer yes or no"
read timeofday
case "timeofday" in
yes) echo "Good Morning";;
no ) echo "Good Afternoon";;
y ) echo "Good Morning";;
n ) echo "Good Afternoon";;
* ) echo "Sorry, answer not recognized";;
esac
- The * will match all strings to it's good at the end
- Here is a concise version of the same
case "$timeofday" in
yes | y | Yes | YES) echo "Good Morning";;
n* | N*) echo "Good Afternoon";;
* ) echo "Sorry, answer not recognized";;
esac
- Here is a version with multiple statements
case "$timeofday" in
yes | y | Yes | YES )
echo "Good Morning"
echo "Up bright and early today"
;;
[nN]*)
echo "Good Afternon"
;;
*)
echo "Sorry your answer isn't recognized"
echo "Please answer yes or no"
exit 1
;;
esac
