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## Index: F

-f option (awk): 9.3.2. Maintaining a Function Library
  11.2.3.1. Command line options
factorials: 8.2.4. Deriving Factorials
faking dynamic regular expressions: 11.1.5. Faking Dynamic Regular Expressions
FAQ on awk: 0.. Other Sources of Information About sed and awk
fflush( ): 11.2.1.3. Flushing buffered output
field separators (see delimiters)
fields for awk records: 2.4.1. Running awk
  7.5. Records and Fields
  B.2.1. Records and Fields
  formatting as output: 7.9. Formatted Printing
  NF variable: 7.7. System Variables
    7.7. System Variables
FIELDSWIDTHS variable (gawk): 11.2.3.6. Separating fields
File Transfer Protocol (FTP): 0.. FTP
files
  closing: 10.2. The close( ) Function
    10.5.2. Working with Multiple Files
  editing multiple: 4.4.2. Making Changes Across a Set of Files
  extracting contents from: 4.4.3. Extracting Contents of a File
  filenames, special: 11.2.1.4. Special filenames
  getting information on: 7.8.1. Getting Information About Files
  Interleaf, converting: 6.1.1.1. Converting an Interleaf file
  multiple: 10.5.2. Working with Multiple Files
  multiple edits to: 4.4.1. Multiple Edits to the Same File
  nextfile statement: 11.2.1.5. The nextfile statement
  reading from: 5.11. Reading and Writing Files
    10.1.1. Reading Input from Files
  retrieving information from: 7.11. Information Retrieval
  scripts as (see scripts)
  search path for: 11.2.3.2. An awk program search path
  special gawk: 11.2.3.7. Additional special files
  writing to: 2.3.2.1. Saving output
    5.11. Reading and Writing Files
    10.5. Directing Output to Files and Pipes
fixed strings: 3.2.3. Writing Regular Expressions
flags: 5.3. Substitution
  g (global): 2.1. Awk, by Sed and Grep, out of Ed
    5.3. Substitution
    5.3. Substitution
  numeric: 5.3. Substitution
    5.3. Substitution
  p (print): 5.3. Substitution
    5.3. Substitution
  w (write): 5.3. Substitution
    5.3. Substitution
flow control: 6. Advanced sed Commands
  6.3.3. Building Blocks of Text
  11.1.6. Control Flow
  branching: 6.4.1. Branching
  d command (sed): 5.4. Delete
  n command: 5.10. Next
flushing buffers: 11.2.1.3. Flushing buffered output
FNR variable: 7.7. System Variables
  10.1.2. Assigning the Input to a Variable
for loop: 8.2.3. For Loop
  8.4.1. Associative Arrays
formatting
  awk output: 7.9. Formatted Printing
  awk scripts: B.2.2. Format of a Script
  index (example program): 12.2. Generating a Formatted Index
  system time: 11.2.3.11. Time management for programmers
FPAT variable (tawk): 11.3.2.1. Tawk language extensions
Free Software Foundation (FSF): 0.2. Availability of sed and awk
FS variable: 7.5.1. Referencing and Separating Fields
  7.5.2. Field Splitting: The Full Story
  7.7. System Variables
  11.2.1.2. Obtaining individual characters
FTP (File Transfer Protocol): 0.. FTP
Ftpmail: 0.. Ftpmail
function keyword: 9.3. Writing Your Own Functions
functions: 11.1.10. Functions
  B.2.6. Statements and Functions
  arithmetic: 9.1. Arithmetic Functions
    11.1.10. Functions
  built-in
    gawk: 11.2.3.9. Additional functions
    tawk: 11.3.2.2. Additional built-in tawk functions
  creating library of: 9.3.2. Maintaining a Function Library
  scope control (tawk): 11.3.2.1. Tawk language extensions
  string-related: 9.2. String Functions
  time-related (gawk): 11.2.3.11. Time management for programmers
  trigonometric: 9.1.1. Trigonometric Functions
  user-defined: 9.3. Writing Your Own Functions

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