Shell Programming and Scripting

 menu() {
    clear
    printf "\n MENU \n\n
    ==================================\n\n\n
    \t 1  Match patient\n
	\t 2  Sanger analysis\n\n
    \t 3  Exit\n\n\n
    ==================================\n\n\n"

    printf "\t Your choice: "; read menu_choice

    case "$menu_choice" in
        1) match ;;
		2) sanger ;;
        3) printf "\n Bye! \n\n"; exit ;;
        *) printf "\n Invalid choice."; sleep 2; menu ;;
    esac
}

  MENU


    ==================================



         1  Match patient

                 2 Sanger analysis


         3  Exit

clear ; printf "%s\n" "MENU" "========================"

# This is not just a menu, it's a loop.  It keeps asking until you
# break out with 'break' or 'exit'.
select X in "Match patient" "Sanger analysis" "Exit"
do
        case "$REPLY" in
        1)      match  ;;
        2)      sanger ;;
        3)      exit   ;;
        esac

        clear ; printf "%s\n" "MENU" "========================"
done

    \t 2  Sanger analysis\n\n

 dialog

$ dialog
-bash: dialog: command not found
$