What Can You Accomplish with AWK?
AWK is recognized as a scripting language which is used to manipulate data plus generate reports. The command programming language of AWK needs no compiling and it permits users to make use of various numeric functions, variables, logical operators, and string functions.
AWK is commonly utilized for pattern processing and scanning and it looks for one or more than one file to view if they comprise lines which do match with the particular patterns before performing the connected actions. AWK is highly useful for producing formatted reports and transforming data files.
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The operations of AWK are as follows:
- AWK scans files line by line.
- AWK does compare input fields or line to patterns.
- Splits all the input lines into fields.
- Performs action or actions on the matched lines.
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The Importance of AWK
AWK is highly important as it is a superb filter plus report writers. Numerous UNIX utilities generate columns and rows of information and the job of AWK is processing these columns and rows and it is viewed as a pseudo-C interpreter because it has a good understanding of the arithmetic operators, like C.
Additionally, AWK has got string manipulation functions, and so, it is capable of searching for specific strings besides modifying the output. It possesses associative arrays that are highly useful and most of the computing languages don’t have this feature.
The “nawk” or “new AWK” is found on the Sun System which people find superior to the previous AWK in numerous ways. It has improved diagnostics and will not print out the not-so-popular message like “bailing out ….” the actual AWK used to do habitually. In place of that, “nawk” does print out the line which it did not understand besides highlighting the unpleasant portions with arrows.
GAWK accomplishes this too and it helps a lot. When you need a feature which is very tough to do in AWK, then you can use GAWK or NAWK. Additionally, you can also transform the scripts of AWK into PERL through the use of “a2p” conversion program that is found with PERL.
Numerous UNIX utilities possess strange names and AWK is considered one of those utilities. However, it is never the short form of awkward. This is a simple and elegant language, and the word “AWK” has been derived from the beginnings of the three developers of the language, like Aho, W.Kernighan, and Weinberger.