#! /bin/bash
   
  echo -e "Enter some character : \c"
  read value
   
   
  case $value in
      [a-z] )
          echo "User entered $value a to z" ;;
      [A-Z] )
          echo "User entered $value A to Z" ;;
      [0-9] )
          echo "User entered $value 0 to 9" ;;
      ? )
          echo "User entered $value special character" ;;
      * )
          echo "Unknown input" ;;
  esac