What does "$>" represent in Ruby documentation? -

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as in:

def pp.pp(obj, out=$>, width=79) ...

this pp method of pp class:
http://www.ruby-doc.org/stdlib-2.0/libdoc/pp/rdoc/pp.html#method-c-pp

$> io destination kernel#print (and therefore puts), , other output methods. defaults $stdout, can changed change behavior of print, printf, puts, etc.


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