From: "Kurt M. Dresner" <kdresner@...>
Date: 2003-08-12T10:53:34+09:00
Subject: Re: NaN and Inifinity

I was able to do:

irb(main):012:0> a = Math::log(-1)
=> NaN
irb(main):013:0> a.class
=> Float
irb(main):014:0> b = "Na".to_f
=> 0.0
irb(main):015:0> a = Math::log(-1)
=> NaN
irb(main):016:0> a.class
=> Float
irb(main):017:0> b = "NaN".to_f
=> NaN
irb(main):018:0> b.class
=> Float
irb(main):019:0> b.nan?
=> true

-Kurt

On Tue, Aug 12, 2003 at 10:38:40AM +0900, Scott Thompson wrote:
> If I do something like
> 
> a = Math::log(-1)
> 
> then a properly takes the value NaN.
> 
> Is there any way to explicitly assign the variable "a" to NaN (or 
> Inifinity or -Infinity) to begin with?  I tried finding "NaN" as a 
> constant but couldn't locate it.  It doesn't appear to be a constant in 
> Float or Math.
> 
> Scott
> 
> 
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