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How do I declare NaN (not a number) in Ruby?

Also "NaN".to_f returns 0 instead of NaN.

question from:https://stackoverflow.com/questions/808653/how-do-i-declare-nan-not-a-number-in-ruby

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Since Ruby 1.9.3 there is a constant to get the NaN value

Float::NAN
=> NaN

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