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Learning AWK Programming

You're reading from   Learning AWK Programming A fast, and simple cutting-edge utility for text-processing on the Unix-like environment

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Product type Paperback
Published in Mar 2018
Publisher Packt
ISBN-13 9781788391030
Length 416 pages
Edition 1st Edition
Languages
Tools
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Author (1):
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Shiwang Kalkhanda Shiwang Kalkhanda
Author Profile Icon Shiwang Kalkhanda
Shiwang Kalkhanda
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Toc

Table of Contents (11) Chapters Close

Preface 1. Getting Started with AWK Programming FREE CHAPTER 2. Working with Regular Expressions 3. AWK Variables and Constants 4. Working with Arrays in AWK 5. Printing Output in AWK 6. AWK Expressions 7. AWK Control Flow Statements 8. AWK Functions 9. GNU's Implementation of AWK – GAWK (GNU AWK) 10. Practical Implementation of AWK

Operators' Precedence

It determines how operators are grouped when different operators appear in a single expression. For example, * has higher precedence than +. So, if we have a + b * c ;it means multiply b and c and then add a to the result. Precedence of operators can be overridden by using parentheses.

This is table of AWK's operator precedence order from highest to lowest:

...

Operator

Description

(…)

Grouping

$

Field reference

++ or - -

Increment, decrement

^ or **

Exponentiation

+, -, !

Unary plus, minus, logical not

*, /, %

Multiplication, division or remainder

+, -

Addition, subtraction

Space

String concatenation

< <= == != > >= >>

Relational operators

~ !~

Match and no match operator

in

Array membership

&&

Logical and

||

Logical or

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