Shell Programming and Scripting

while (1) {
* * * * *print "Enter 'n' for New , 'e' for Existing or 'q' to quit: ";
* * * * *chomp($response = <STDIN>);
* * * * *die "Exiting Process \n" if $response =~ /^q$/i;
* * * * *last if $response =~ /^[ne]$/i;
* * * * *print "Invalid entry - enter 'n', 'e', or 'q' \n";
}

RESPONSE=""

while ! [ "$RESPONSE" = "q" ]
do
        printf "Enter 'n' for New , 'e' for Existing or 'q' to quit: "
        read RESPONSE
        case "$RESPONSE" in
        n)     echo "code for n"
                ;;
        e)     echo "code for existing"
                ;;
        q)     ;; # Do nothing, let the while-loop break
        *)     echo "Invalid option, try again"
                ;;
        esac
done

while true
do
   read -r -p "Enter 'n' for New , 'e' for Existing or 'q' to quit: " -n 1 response
   [ "${response}." = "q." ] && echo -e "\nExiting Process" && exit
   [ "${response}." = "n." -o "${response}." = "e." ] && break
   echo -e "\nInvalid entry - enter 'n', 'e', or 'q'"
done