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# Index: A

a command (sed) : 5.5. Append, Insert, and Change
abort statement (tawk) : 11.3.2.1. Tawk language extensions
acronym processor (example) : 8.5. An Acronym Processor
addition (+) operator : 7.6. Expressions
addresses, line
  2.1. Awk, by Sed and Grep, out of Ed
  4.2. A Global Perspective on Addressing
  5.1. About the Syntax of sed Commands
  addressing by pattern
    2.1. Awk, by Sed and Grep, out of Ed
    A.2.1. Pattern Addressing
  printing with = : 5.9. Print Line Number
adj script (example) : 13.5. adj - Adjust Lines for Text Files
alignment of output fields : 7.9. Formatted Printing
ampersand (&)
  && (logical AND) operator : 7.8. Relational and Boolean Operators
  in replacement text
    5.3. Substitution
    5.3.1. Replacement Metacharacters
anchors
  3.2. A Line-Up of Characters
  3.2.7. Positional Metacharacters
AND (&&) operator : 7.8. Relational and Boolean Operators
append command : (see a command (sed))
ARGC variable : 8.6. System Variables That Are Arrays
ARGI variable (tawk) : 11.3.2.1. Tawk language extensions
ARGIND variable (gawk) : 11.2.3.8. Additional variables
ARGV variable : 8.6. System Variables That Are Arrays
  ARGI variable with (tawk) : 11.3.2.1. Tawk language extensions
  ARGIND variable with (gawk) : 11.2.3.8. Additional variables
arithmetic functions
  9.1. Arithmetic Functions
  11.1.10. Functions
arithmetic operators, awk : 7.6. Expressions
arrays
  8.4. Arrays
  11.1.8. Arrays
  B.2.5.4. Arrays
  deleting elements of
    8.4.6. Deleting Elements of an Array
    11.1.8. Arrays
    11.2.1.1. Deleting all elements of an array
  multidimensional
    8.5.1. Multidimensional Arrays
    11.3.2.1. Tawk language extensions
  parsing strings into elements
    8.4.4. Using split() to Create Arrays
    11.2.1.2. Obtaining individual characters
  sorting elements in (tawk) : 11.3.2.1. Tawk language extensions
  splitting : 11.2.1.2. Obtaining individual characters
  system variables that are : 8.6. System Variables That Are Arrays
  testing for membership in : 8.4.2. Testing for Membership in an Array
assigning input to variables : 10.1.2. Assigning the Input to a Variable
assignment operators, awk : 7.6. Expressions
associative arrays : 8.4.1. Associative Arrays
asterisk (*)
  ** (exponentiation) operator : 7.6. Expressions
  **= (assignment) operator : 7.6. Expressions
  *= (assignment) operator : 7.6. Expressions
  as metacharacter
    3.1. That's an Expression
    3.2.5. Repeated Occurrences of a Character
  multiplication operator : 7.6. Expressions
automatic edits : 4.4.4. Edits To Go
awk
  1.3. A Pattern-Matching Programming Language
  2.1. Awk, by Sed and Grep, out of Ed
  2.4. Using awk
  11.1. Original awk
  arrays : (see arrays)
  built-in functions : 11.1.10. Functions
  built-in variables
    7.7. System Variables
    11.1.11. Built-In Variables
  command-line syntax
    2.2. Command-Line Syntax
    B.1. Command-Line Syntax
  commands
    5.1. About the Syntax of sed Commands
    B.3. Command Summary for awk
    (see also under specific command)
  documentation for : Other Sources of Information About sed and awk
  error messages : 2.4.2. Error Messages
  escape sequences : B.2.5.2. Escape sequences
  extensions to : 11.2.1. Common Extensions
  functions : (see functions)
  invoking with #!
    10.9. Invoking awk Using the #! Syntax
    B.1.1. Shell Wrapper for Invoking awk
  limitations to : 10.8. Limitations
  obtaining : Availability of sed and awk
  operators
    B.2.5.6. Operators
    (see operators, awk)
  options : 2.4.3. Summary of Options
  POSIX standards for : 7. Writing Scripts for awk
  programming model : 7.3. Awk's Programming Model
  quick reference : B. Quick Reference for awk
  regular expression metacharacters : B.2.4. Regular Expressions
  with sed : 2.5. Using sed and awk Together
  system variables : B.2.5.5. System variables
  versions of
    Availability of sed and awk
    11.2.2. Bell Labs awk
  writing scripts in : 7. Writing Scripts for awk
AWKPATH variable (gawk) : 11.2.3.2. An awk program search path

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