…In addition to the print statement, AWK…provides the function printf for formatted printing.…In this lesson, we'll use printf to output a file of names, email…addresses, and bowling averages, in a nice columnal format for a fixed width font.…You might do this to output the information…interactively, for easy reading in the terminal window.…The printf function in AWK has much the same…syntax as it does in the C programming language.…Printf takes one argument which is a format and a number…of arguments after that of values depending on the original format.…
The parentheses after printf are optional in AWK, but…in most circumstances it's a good practice to include them.…This function outputs zero or more values…in the format specified by its format argument.…Which is a single string containing format specifiers…that tell printf how to output the value arguments.…Each format specifier is matched to a value in order.…Here's the input file we'll be using for this lesson.…As you see, it is a comma separated file with…
Author
Released
5/21/2014In this course, award-winning author and teacher David D. Levine shows you how to use AWK to read and write data in a variety of formats, produce reports, and automate repetitive tasks. He reviews the nuts and bolts of the language, such as field separators, pattern matching, variables, operators, expressions, and control structures; functions available for manipulating data; and integration with other programs like Excel.
- Determine what AWK is.
- Recognize how to write an AWK program.
- Determine how to use AWK command-line flags.
- Identify how to specify field and record separators with variables.
- Distinguish how to change a CVS file to a tab-separated one.
- Break down how to work with operators and arrays.
- Discover how to format output.
- Interpret how to string data with functions.
Skill Level Intermediate
Duration
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Introduction
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Welcome59s
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1. What Is AWK?
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What is AWK?3m 11s
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2. AWK Command Line Basics
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Writing an AWK program2m 51s
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Using AWK command-line flags6m 18s
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3. Understanding Records and Fields
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4. Understanding Variables and Operators
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5. A Quick Introduction to Regular Expressions
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Regular expression basics5m 19s
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6. Using Control Structures
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Building control structures4m 14s
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Creating an HTML table4m 45s
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7. Formatting the Output
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8. Functions and Arrays
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Manipulating strings7m 28s
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Using associative arrays4m 55s
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9. Combining AWK with Other Tools
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Using pipes7m 6s
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Scripting with AWK4m 56s
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Challenge: Perform a join1m 13s
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Solution: Perform a join2m 55s
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Conclusion
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Goodbye1m 10s
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Video: Formatting output with printf()