July 2013
Intermediate to advanced
282 pages
6h 28m
English
Content preview from Good MathBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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What’s an Integer?
If you have the natural numbers and you want the integers, all you have to do is add an additive inverse. If you understand the naturals and want to understand the integers, you also only need to add one thing: direction. If you think of a number line, the natural numbers start from zero and go to the right, but there’s nothing to the left of zero. Integers start with the naturals and add negative numbers moving to the left on the other side of zero.
The meaning of integers follows from the notion of direction. Positive integers mean the same thing as the natural numbers, both as cardinals and as ordinals. Negative numbers allow you to move in the other direction. If you think in terms of cardinals, integers allow you to ...
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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.
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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.