June 2005
Beginner
480 pages
10h 31m
English
Content preview from SAMS Teach Yourself Perl in 24 Hours THIRD EDITION
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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.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.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.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.
Q&A
| Q1: | The output of the Interest program looks sloppy. How do I control how many digits are displayed? |
| A1: | The easiest way to control the number of decimal digits is to use the printf function, which is covered in Hour 9, “More Functions and Operators.” |
| Q2: | Does Perl have a function for rounding? |
| A2: | The printf function usually does what you want for rounding when displaying numbers. If you really need the round function, check out the POSIX module, which has this function and many more. |
| Q3: | How large (or small) of a number will Perl let me manipulate? |
| A3: | The answer depends on your operating system. A typical Intel Unix system's double-precision floating-point numbers can have more than 300 places in the exponent. This means you can manipulate ... |
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