PL/pgSQL CASE statement

select
    text
        (
            case age
            when 24  then
            'Rahmad'
            else
            'uknow'
            end
        ) as "24",
    text
        (
            case age
            when 19 then
            'Rahmadi'
            else
            'Andari'
            end
        ) as "19",
    text
        (
            case age
            when 21 then
            'Wandi'
            else
            'uknow'
            end
        ) as "21",
    text
        (
            case age
            when 22 then
            'Wildan'
            else
            'uknow'
            end
        ) as "22"
    from employe;