What does CHMOD O+W mean?

I know how to chmod files, but I've always gone by numbers. Like 777 or 644.

Can anyone tell me the number equivalent of CHMOD O+W?

 

Well, o +w means something like "Give write access to others group", so it would be 0002.
(Or without the leading 0: 002)

http://www.javascriptkit.com/script/script2/chmodcal.shtml

=]

 

the numbers are in octal (if you know the octal no. system).
they stand for owner(1st digit), group (2nd digit), others.
each digit is the sum of write,read,execute permissions in octal.