December 2015
Intermediate to advanced
400 pages
13h 3m
English
Content preview from Swift Programming: The Big Nerd Ranch Guide
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Floating-Point Numbers
To represent a number that has a decimal point, like 3.2, you use a floating-point number. There are two things to bear in mind about floating-point numbers. First, in computers floating-point numbers are stored as a mantissa and an exponent, similar to how you write a number in scientific notation. For example, 123.45 could be stored similarly to 1.2345 x 102 or 12.345 x 101 (although the computer will use base 2 instead of base 10). Additionally, floating-point numbers are often imprecise: There are many numbers that cannot be stored with perfect accuracy in a floating-point number. The computer will store a very close approximation to the number you expect. (More on that in a moment.)
Swift has two basic ...
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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.