May 2022
Intermediate to advanced
456 pages
11h 7m
German
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3Variablen
In diesem Kapitel lernen wir die Deklaration und Verwendung sowie die prinzipiellen Unterschiede von Variablen kennen.
3.1Veränderbare und nicht veränderbare Variablen
Das Schlüsselwort let
Informell haben wir Variablen und ihre Deklaration bereits kennengelernt. Wir deklarieren eine Variable mit dem Befehl let <variable>, optional mit der durch Doppelpunkt getrennten Angabe eines Typs und gleichfalls optional mit der Zuweisung eines Wertes. Einer solchen Variable mit ausschließlichem Lesezugriff kann maximal einmal ein Wert zugewiesen werden.
Typinferenz
Aufgrund der hervorragenden Arbeit des Compilers bei der Typinferenz brauchen wir bei der Variablendefinition nur sehr selten eine explizite Typangabe. Manchmal kann dies trotzdem ...
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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.