perl pack function

Hi,
if i do the following:

my $tmp_char= pack("U", 9786);
#9786 is the decimal equivalent of the hex: 263A

then $tmp_char now contains the Unicode character "WHITE SMILING FACE"

Q: Does pack have to take a deminal integer - or can i somehow pass a hex 
value to it?
ie something like: my $tmp_char= pack("U", 263A);

thanks for your time.




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