February 2017
Beginner
1056 pages
28h 57m
English
Content preview from Java: An Introduction to Problem Solving and Programming, 8th EditionBecome 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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2.1 Variables and Expressions
In this section, we explain how simple variables and arithmetic expressions are used in Java programs. Some of the terms used here were introduced in Chapter 1. We will, however, review them again.
Variables
Variables in a program are used to store data such as numbers and letters. They can be thought of as containers of a sort. The number, letter, or other data item in a variable is called its value. This value can be changed, so that at one time the variable contains, say, 6, and at another time, after the program has run for a while, the variable contains a different value, such as 4.
For example, the program in Listing 2.1 uses the variables
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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.