case Command Examples
Bash builtin construct for creating multi-choice conditional statements. More information: https://www.gnu.org/software/bash/manual/bash.html#index-case.
- Match a variable against string literals to decide which command to run:
case {{$COUNTRULE}} in {{words}}) {{wc -w README}} ;; {{lines}}) {{wc -l README}} ;; esac
- Combine patterns with |, use * as a fallback pattern:
case {{$COUNTRULE}} in {{[wW]|words}}) {{wc -w README}} ;; {{[lL]|lines}}) {{wc -l README}} ;; *) {{echo "what?"}} ;; esac
- Allow matching multiple patterns:
case {{$ANIMAL}} in {{cat}}) echo "It's a cat" ;;& {{cat|dog}}) echo "It's a cat or a dog" ;;& *) echo "Fallback" ;; esac
- Continue to the next pattern's commands without checking the pattern:
case {{$ANIMAL}} in {{cat}}) echo "It's a cat" ;& {{dog}}) echo "It's either a dog or cat fell through" ;& *) echo "Fallback" ;; esac