Shell helper function to show yes/no prompt

aye_or_nay.sh

function aye_or_nay() {
  local response
  local result

  while [[ -z "${result:-}" ]]; do
    echo -n "$1 (y/n) "
    read response

    case "$(echo "${response}" | tr '[:upper:]' '[:lower:]')" in
      aye | yes | y )
        result=true
        ;;
      nay | no | n )
        result=false
        ;;
      * )
        echo "Could you please repeat"
    esac
  done

  $result
}

if aye_or_nay "Do you like it?"; then
  echo "I'm glad you liked it!"
else
  echo "Well, your loss!"
fi