July 1998
Intermediate to advanced
1456 pages
65h 5m
English
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Name
NaN — NN 3 IE J2 ECMA 1
Synopsis
Read-only
Equal to a value that is not-a-number. JavaScript returns this value
when a numerical operation yields a non-numerical result because of a
flaw in one of the operands. If you want to test whether a value is
not a number, use the isNaN() global function
rather than comparing to this property value.
Value
NaN
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.