Case bash example

case.sh

#!/usr/bin/env bash
#
# show
# Hello Mr. Anonymous. You work at UNKNOWN COMPANY
#
# show -name Mike
# Hello Mr. Mike. You work at UNKNOWN COMPANY
#
# show -job Intel
# Hello Mr. Anonymous. You work at Intel
#
# show -name Mike -job Intel
# Hello Mr. Mike. You work at Intel
#

NAME=Anonymous
JOB="UNKNOWN COMPANY"
while [[ $# -gt 0 ]]
do
  case $1 in
    -name) NAME=$2; shift 2;;
    -job)  JOB=$2; shift 2;;
    *) echo "Unknown Argument: $1"; exit;;
  esac
done

echo Hello Mr $NAME. You work at $JOB