From: Troy Denkinger <tdenkinger@...>
Date: 2006-11-18T02:49:55+09:00
Subject: Re: ruby equivalent PHP function is_numeric?

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What purpose does the underscore play? I see that it is accepted, I just
> can't figure out why. I have never seen it as part of proper numeric
> syntax, anywhere, in three decades in this business.



It's used to make numbers easier to read:

1_000_000_000 vs. 1000000000

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