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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
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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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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

Looping statement

A loop is a conditional construct that allows us to perform one or more actions again and again till the condition is true as specified in expression. In AWK we can specify a loop using a while, do or for statement.

The while loop

The while is the simplest looping statement in AWK. A while statement has a condition and a body. The body contains the action statements that are executed till the condition is true. The condition could be a logical condition or conditional-expression that evaluates to true. First while statement tests the condition; if the condition evaluates to true, then it executes the statements specified in the body. Once all the statements specified in the body have been executed, the condition...

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