From: Tim Hunter <rmagick@...>
Date: 2008-11-08T04:15:43+09:00
Subject: Re: Another require question

Ed Hardy wrote:
(snip)
> For instance, this line fails:
> 
> puts math.sqrt(234)
> 
> it outputs this error:
> 
> "undefined local variable or method `math' for main:Object (NameError)"
> 
> this line fails:
> 
> f= file.open('c:\cher.bat') # similar error message as above
(snip)

In Ruby, case matters. It's Math.sqrt, not math.sqrt, and File.open, not 
file.open.

In Ruby, variables that start with an uppercase character are constants, 
and the names of modules (like Math) and classes (like File) are 
constants.

Variables that start with a lowercase character are just plain 
variables.
-- 
Posted via http://www.ruby-forum.com/.