Here's a really simple example of how to create a switch statement in Bash.
Let's start with a really simple script that will prompt the user to enter their favourite Git hosting provider and store the answer in a variable called SERVICE.
#!/usr/bin/env bash
read -p "Name your favourite Git hosting service: " SERVICE
Next, let's handle the responses of the question using a switch statement.
#!/usr/bin/env bash
read -p "Name your favourite Git hosting service: " SERVICE
case "$SERVICE" in
'github') echo "GitHub is the best!" ;;
'gitlab') echo "GitLab is pretty cool too!" ;;
'bitbucket') echo "Not so keen on Bitbucket!" ;;
*) echo "Never heard of ${SERVICE}, sorry"
exit 1
;;
esac
As you can see, we handle 3 Git hosting providers and also use * which acts as the default case.
We can mimic fallthrough behaviour and chain certain conditions together too:
#!/usr/bin/env bash
read -p "Name your favourite Git hosting service: " SERVICE
case "$SERVICE" in
'github' | 'gitlab') echo "Good choice!" ;;
'bitbucket') echo "Not so keen on Bitbucket!" ;;
*) echo "Never heard of ${SERVICE}, sorry"
exit 1
;;
esac