June 2005
Intermediate to advanced
794 pages
18h 27m
German
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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.
Kapitel 2. Zahlen
2.0 Einführung
Im täglichen Leben kann man Zahlen leicht identifizieren. Es gibt Zeitangaben wie 15:00 oder Preise wie EUR 1,29 für einen Liter Milch. Zahlen können wie π (Verhältnis zwischen Kreisumfang und -durchmesser) aussehen. Zahlen können auch ziemlich groß sein, wie die Avogadro-Zahl, die ungefähr 6 × 1023 beträgt. In PHP sind Zahlen für alle diese Dinge geeignet.
Jedoch sind für PHP nicht alle diese Zahlen einfach nur »Zahlen«, sondern sie werden in zwei Gruppen eingeteilt: Integer-Zahlen (ganze Zahlen) und Fließkommazahlen. Integer-Zahlen sind Zahlen wie −4, 0, 5 und 1,975. Fließkommazahlen sind Dezimalzahlen wie −1,23, 0,0, 3,14159 und 9,9999999999.
PHP sorgt aber meistens dafür, dass Sie sich um die Unterschiede zwischen ...
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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.
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.