Till now we have seen different conditional constructs and loop construct such as if...else, while, for, switch and do statements. Now, we will study break, continue and exit statements which are used to alter the normal flow of program. A loop performs a set of repetitive tasks until the conditional-expression becomes false, but sometimes it is desirable to skip some action statements inside the loop or terminate the loop immediately without checking the conditional-expression. In such cases, break and continue statements are used.
Learning AWK Programming
By :
Learning AWK Programming
By:
Overview of this book
AWK is one of the most primitive and powerful utilities which exists in all Unix and Unix-like distributions. It is used as a command-line utility when performing a basic text-processing operation, and as programming language when dealing with complex text-processing and mining tasks. With this book, you will have the required expertise to practice advanced AWK programming in real-life examples.
The book starts off with an introduction to AWK essentials. You will then be introduced to regular expressions, AWK variables and constants, arrays and AWK functions and more. The book then delves deeper into more complex tasks, such as printing formatted output in AWK, control flow statements, GNU's implementation of AWK covering the advanced features of GNU AWK, such as network communication, debugging, and inter-process communication in the GAWK programming language which is not easily possible with AWK.
By the end of this book, the reader will have worked on the practical implementation of text processing and pattern matching using AWK to perform routine tasks.
Table of Contents (11 chapters)
Preface
Free Chapter
Getting Started with AWK Programming
Working with Regular Expressions
AWK Variables and Constants
Working with Arrays in AWK
Printing Output in AWK
AWK Expressions
AWK Control Flow Statements
AWK Functions
GNU's Implementation of AWK – GAWK (GNU AWK)
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