infinity / ruby

Como encontrar o infinito em Ruby

1.9.3-p0 :001 > 1/0
 ZeroDivisionError: divided by 0

1.9.3-p0 :002 > 1.0/0
 => Infinity 

1.9.3-p0 :006 > -1.0/0
=> -Infinity

1.9.3-p0 :004 > Float::INFINITY
=> Infinity 

1.9.3-p0 :005 > -Float::INFINITY
=> -Infinity

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