AwkGuide

Work in Progress

 import from Mark Hobley's wiki

Overview

• Overview

Features of awk

• Features of awk

When to use awk

• [[When_to_use_awk?]]

Which version of awk should I choose?

• Which version of awk should I choose?

Invocation

• Invoking an awk program

Hello World

• Hello World in awk

How to awk

• actions
• arithmetic
• ARGC
• ARGV
• [[associative_container?|array]]s
• assignment
• [[associative_container?]]s
• backslash
• BEGIN
• bitwise operators
• [[block?]]s
• braces
• branches
• [[builtin_function?]]s
• calling section
• case conversion
• case sensitivity
• [[caveat?]]s
• [[close?]]
• [[command?]]s
• command line parameters
• comments
• comparative operators
• compound assignment operators
• concatenation
• conditional branches
• [[conditional_loop?]]s
• constants
• [[constructor?]]s
• [[context?]]
• continuation character
• control structures
• [[conversion_qualifier?]]s
• [[conversion_specifier?]]s
• [[datatype?]]s
• [[declaration?]]
• [[default_variable?]]
• [[define_functions?]]
• delimiters
• [[destructor?]]s
• division
• [[doublequotes?]]
• [[empty_statement?]]
• [[empty_string?]]
• END
• enumeration
• ENVIRON
• [[error_handling?]]
• escape sequences
• [[expression?]]s
• fields
• field reference operator
• field separator
• file handling
• [[floating_point?]] numbers
• [[for_loop?]]s
• [[foreach?]] loops
• FS
• [[function?]]s
• gawkisms
• getline
• goto
• [[grouping_arguments?]]
• hashbang
• hash symbol
• here documents
• [[identifier?]]s
• if conditional constructs
• include files
• [[infinite_loop?]]s
• input
• [[instruction?]]s
• integer division
• [[internal?]]s
• [[interpolation?]]
• [[iteration?]]
• iterative loops
• [[invocation?]]
• keywords
• labels
• [[libraries?]]
• line continuation
• [[list?]]s
• [[literal_character?]]s
• [[locale?]]
• [[loop?]]s
• [[loop_modifier?]]s
• limitations
• [[loop?]]s
• main
• mathematical functions
• mistakes

• modulus operator
• [[multiline?]] records
• multiplication
• NF
• nudge operators
• numbers
• operators
• output
• parentheses
• patterns
• precedence
• print
• printf
• [[putline?]]
• [[quotationmark?]]s
• quotient division
• read only variables
• records
• redirection
• record separator
• regular expressions
• regular expression operators
• repeat loops
• return
• RS
• rules
• [[search_pattern?]]s
• special variables
• statements
• strings
• string manipulation
• string manipulation functions
• [[sub?]]
• substrings
• symbols
• [[table?]]s
• tolower
• toupper
• truth
• [[typecast?]]ing
• [until loop]s
• [[value?]]s
• variables
• variable assignment
• [[variable_name?]]s
• [[variable_substitution?]]
• [[while?]] loops
• whitespace

Conversion of scripts to suit different awk versions

• Converting gawk scripts to traditional awk
• gawkisms