sh9
    #! /bin/sh
    echo menu test program
    stop=0
    echo menu test program
    while test $stop -eq 0
    do
      cat << ENDOF
      1    : print the date
      2, 3 : print working directory
      4    : exit
    ENDOF
    echo
    echo 'your choice? \c'
    read reply
    echo
    case $reply in
     "1")
      date
      ;;
     "2"|"3")
      pwd
      ;;
     "4")
      stop=1
     ;;
     *)
     echo invalid choice
     ;;
     esac
    done
    
    with input
    1
    2
    3
    4
    
    produces
    
    
    
    menu test program
    menu test program
      1    : print the date
      2, 3 : print working directory
      4    : exit
    
    your choice? \c
    
    Mon Jul 31 13:47:19 PDT 2006
      1    : print the date
      2, 3 : print working directory
      4    : exit
    
    your choice? \c
    
    /cs/faculty/teo/public_html/cs60.m06/prog
      1    : print the date
      2, 3 : print working directory
      4    : exit
    
    your choice? \c
    
    /cs/faculty/teo/public_html/cs60.m06/prog
      1    : print the date
      2, 3 : print working directory
      4    : exit
    
    your choice? \c