You're reading from Linux Command Line and Shell Scripting Bible - Third Edition

Product typeBook

Published inJan 2015

PublisherWiley

ISBN-139781118983843

Edition3rd Edition

Tools

Linux

Concepts

Shell Scripting

Authors (2):

Richard Blum

Christine Bresnahan

View More author details

Built-In Functions

The gawk programming language provides quite a few built-in functions that perform common mathematical, string, and even time functions. You can utilize these functions in your gawk programs to help cut down on the coding requirements in your scripts. This section walks you through the different built-in functions available in gawk.

Mathematical functions

If you've done programming in any type of language, you're probably familiar with using built-in functions in your code to perform common mathematical functions. The gawk programming language doesn't disappoint those looking for advanced mathematical features.

Table 22.4 shows the mathematical built-in functions available in gawk.

Table 22.4 The gawk Mathematical Functions

Function	Description
`atan2(x,` `y)`	The arctangent of `x` / `y`, with `x` and `y` specified in radians
`cos(x)`	The cosine of `x`, with `x` specified in radians
`exp(x)`	The exponential of `x`
`int(x)`	The integer part of `x`, truncated toward...

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Linux Command Line and Shell Scripting Bible - Third Edition

Published in: Jan 2015Publisher: WileyISBN-13: 9781118983843

Authors (2)

Richard Blum

Richard Blum has more than 25 years as a network and systems administrator, currently managing Microsoft, Unix, Linux, and Novell servers for a network with more than 3,500 users. He has developed online programming and Linux courses that he teaches to students worldwide.
Read more about Richard Blum

Christine Bresnahan

Christine Bresnahan has worked in the IT industry for more than 30 years and is currently an adjunct professor of Python programming and Linux system administration classes at Ivy Tech Community College in Indianapolis. She is the co-author of Linux Bible, Eighth Edition, and Linux Command Line and Shell Scripting Bible.
Read more about Christine Bresnahan

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