How do you echo a 4-digit Unicode character in Bash?

Question

I\'d like to add the Unicode skull and crossbones to my shell prompt (specifically the \'SKULL AND CROSSBONES\' (U+2620)), but I can\'t figure out the magic incantation to m

Answer 1

% echo -e '\u2620'     # \u takes four hexadecimal digits
☠
% echo -e '\U0001f602' # \U takes eight hexadecimal digits