Do something like: 
print unpack('b32',pack('L',$num));

[download]
See pack/unpack for more details. You need other types for floats ('b128','d') or other integer types.

Hope this helps,

Jeroen
"We are not alone"(FZ)

Update: Noticed the posts of tadman and stefan_k. From stefan_k's link I understand that binary sprintf is only available in perl 5.6 or higher.

In reply to Re: decimal to binary by jeroenes
in thread decimal to binary by tsvika_t

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