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## Index: B

b command (sed): 6.4.1. Branching
B escape sequence: 11.2.3.4. Extended regular expressions
backreferences (see numbered replacement strings)
backslash ( ): 7.6. Expressions
  (see also escape sequences, awk)
  <, > escape sequences: 3.2.11. What's the Word? Part II
    11.2.3.4. Extended regular expressions
  `, ' escape sequences: 11.2.3.4. Extended regular expressions
  character classes and: 3.2.4. Character Classes
  as metacharacter: 3.2. A Line-Up of Characters
    3.2.1. The Ubiquitous Backslash
  in replacement text: 5.3. Substitution
    5.3.1. Replacement Metacharacters
bang (!) (see exclamation point)
basic regular expressions (BREs): 3.2.4.3. POSIX character class additions
BEGIN pattern: 7.2. Hello, World
  command-line parameters and: 7.10. Passing Parameters Into a Script
BEGIN procedure: 11.1.6. Control Flow
BEGINFILE procedure (tawk): 11.3.2.1. Tawk language extensions
beginning
  of line (see ^ (circumflex))
Bell Labs awk: 11.2.2. Bell Labs awk
BITFTP: 0.. BITFTP
blocks of text: 6.3.3. Building Blocks of Text
Boolean operators, awk: 7.8. Relational and Boolean Operators
  variables as Boolean patterns: 11.1.4. Variables as Boolean Patterns
braces {}: A.2.1. Pattern Addressing
  in awk: 2.1. Awk, by Sed and Grep, out of Ed
    2.4.1. Running awk
    8.1. Conditional Statements
  {} metacharacters: 3.2. A Line-Up of Characters
    3.2.8. A Span of Characters
  grouping sed commands in: 4.2.1. Grouping Commands
    5.1. About the Syntax of sed Commands
bracket expressions: 3.2.4. Character Classes
brackets []
  [::] metacharacters: 3.2.4.3. POSIX character class additions
  [..] metacharacters: 3.2.4.3. POSIX character class additions
  [==] metacharacters: 3.2.4.3. POSIX character class additions
  as metacharacters: 3.2. A Line-Up of Characters
    3.2.4. Character Classes
branch command (see b command (sed))
branching: 6.4.1. Branching
break statement: 8.3. Other Statements That Affect Flow Control
breaking lines: 11.2.3.3. Line continuation
BREs (basic regular expressions): 3.2.4.3. POSIX character class additions
buffers, flushing: 11.2.1.3. Flushing buffered output
built-in functions
  awk: 11.1.10. Functions
  gawk: 11.2.3.9. Additional functions
  tawk: 11.3.2.2. Additional built-in tawk functions
built-in variables: 7.7. System Variables
  11.1.11. Built-In Variables

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