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Mastering Bash

You're reading from   Mastering Bash A Step-by-Step Guide to working with Bash Programming and Shell Scripting

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Product type Paperback
Published in Jun 2017
Publisher Packt
ISBN-13 9781784396879
Length 502 pages
Edition 1st Edition
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Author (1):
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Giorgio Zarrelli Giorgio Zarrelli
Author Profile Icon Giorgio Zarrelli
Giorgio Zarrelli
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Toc

Table of Contents (15) Chapters Close

Preface 1. Let's Start Programming 2. Operators FREE CHAPTER 3. Testing 4. Quoting and Escaping 5. Menus, Arrays, and Functions 6. Iterations 7. Plug into the Real World 8. We Want to Chat 9. Subshells, Signals, and Job Controls 10. Lets Make a Process Chat 11. Living as a Daemon 12. Remote Connections over SSH 13. Its Time for a Timer 14. Time for Safety

Operators evaluation order and precedence in decreasing relevance

Operators are evaluated in a precise order and we must keep this in mind when working with them. It is not so easy to remember what is evaluated before and what after, so the following table will help us to keep in mind the order and precedence of operators:

Operator

Evaluation order

++ --

Unary operators for incrementing/decrementing, evaluated from left to right

+- !~

Unary plus and minus, evaluated from right to left

* / %

Multiplication, division, modulo, are evaluated from left to right and are evaluated after

+ -

Addition and subtraction are evaluated from left to right

<<>>

Bitwise shift are evaluated from left to right

<= =><>

Comparison operators, from left to right

== !=

Equality operators, from left to right

&

Bitwise AND...

You have been reading a chapter from
Mastering Bash
Published in: Jun 2017
Publisher: Packt
ISBN-13: 9781784396879
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