Enter Any Character and Check Capital,Small Or Numeric in Linux Shell Scripts

echo "Enter Any Character:->";
read c

case $c in
    [a-z]) echo "You Enter a To z Small Letter";
        ;;
    [A-Z]) echo "You Enter A To Z Capital Letter";
        ;;
    [0-9]) echo "You Enter 0 To 9 Digit";
        ;;
    ?) echo "You Have Enter Special Character";
        ;;
    *) echo "You Enter More Than One Character";
        ;;
esac