Bash - Multiple choice, user input

Question

I am quite new in bash and would like to link appropriate choice with profile parameters for that user. Problem is that is not recognize my selection

I have already tried to test but have had syntax error near unexpected token `newline'

> echo "Name? Use, alphabetic letter from multiple choice. 
a)Donald
b)Alan 
c)Brian"

  read -p "Insert appropriate letter a, b or c" don ala br

  echo "Perfect" $don 
  echo "Perfect, OK" $ala 
  echo "Perfect, Nice" $br

  case "$dev" 
  echo "OK" 
  esac

I would like to hit letter and enter afterwards go to case where define params for the profile. I have encountered below error: syntax error near unexpected token `newline'

Answer 1

select is usually used for command line menus. It normally expects only one answer, but you can tweak it for example in the following way:

#! /bin/bash

names=(Donald Alan Brian)
selected=()
PS3='Name? You can select multiple space separated options: '
select name in "${names[@]}" ; do
    for reply in $REPLY ; do
        selected+=(${names[reply - 1]})
    done
    [[ $selected ]] && break
done
echo Selected: "${selected[@]}"

Answer 2

Here's something that will restrict the input to only a, b, c; allowing upper or lower case; waiting for one of those values.

Putting the upper case value in THIS_SELECTION and then using it in a case statement:

#!/bin/bash
echo "Name? Use, alphabetic letter from multiple choice. 
    a)Donald
    b)Alan 
    c)Brian"

THIS_SELECTION=
until [ "${THIS_SELECTION^}" == "A" ] || [ "${THIS_SELECTION^}" == "B" ] || [ "${THIS_SELECTION^}" == "C" ]; do
    read -n1 -p "Insert appropriate letter a, b or c: "  THIS_SELECTION
    THIS_SELECTION=${THIS_SELECTION^}
    echo;
done 

case "${THIS_SELECTION}" in
    A) echo A Donald ;;
    B) echo B Alan ;;
    C) echo C Brian ;;
    *) echo other ;;
esac