Index

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# Index: N

n command (debugger)
  Perl in a Nutshell, Chapter 6, Reference: n
  Programming Perl, 8.1.1. Debugger Commands
\n, in single-quoted strings : Learning Perl, 2.3.1. Single-Quoted Strings
n index
  Entry widget : Perl in a Nutshell, 18.8.1. Text Indexes
  Listbox widget : Perl in a Nutshell, 18.10.1. Listbox Indexes
  Menu widget : Perl in a Nutshell, 18.15.1. Menu Indexes
  Text widget : Perl in a Nutshell, 18.11.1. Text Indexes and Modifiers
-n option (sed) : Learning Perl, 18.2. Converting sed Programs to Perl
\n (newline) sequence : Perl in a Nutshell, 4.6.3. Escaped Sequences
-n switch, perl
  Perl Cookbook, 7.7. Writing a Filter
  Perl in a Nutshell, 3.2. Command-Line Options
  Programming Perl, 6.1.2. Switches
Nagle's algorithm : Perl Cookbook, 17.3. Communicating over TCP
naked blocks : Learning Perl, 9.1. The last Statement
NAME attribute (DBI) : Perl in a Nutshell, 12.2.3. Database Handles and Statement Handles
name() (Mail::Address) : Perl in a Nutshell, Chapter 14, Reference: name
name=value pairs : (see queries)
named parameters (CGI) : Perl in a Nutshell, 10.4. Named Parameters
named pipes
  Perl Cookbook, 16.11. Making a Process Look Like a File with Named Pipes
  Perl Cookbook, 16.22. Program: sigrand
  Programming Perl, 6.2.2.4. Named pipes
named unary operators
  Programming Perl, 2.3.7.3. Filename globbing operator
  Programming Perl, 2.5.10. Named Unary and File Test Operators
names
  arrays : Programming Perl, 2.3.1. Variables
  capitalization conventions
    (see also case/capitalization)
    Programming Perl, 2.3.1. Variables
  commands : Programming Perl, 1.2.2. Verbs
  current subroutines : Perl Cookbook, 10.4. Determining Current Function Name
  current working directory : Programming Perl, 7.2.7. Cwd - Get Pathname of Current Working Directory
  filenames : (see filenames)
  format : (see format, names)
  functions : Programming Perl, 1.2.2. Verbs
  getting from network addresses
    Programming Perl, 3.2.47. gethostbyaddr
    Programming Perl, 3.2.51. getnetbyaddr
  getting from port number : Programming Perl, 3.2.64. getservbyname
  hashes
    Advanced Perl Programming, 1.3. Nested Data Structures
    Programming Perl, 2.3.1. Variables
  labels and filehandles : Programming Perl, 2.3.1. Variables
  loop labels : Perl in a Nutshell, 4.3.1.5. Loop control
  modules/packages
    Advanced Perl Programming, 6.2. Packages and Files
    Perl in a Nutshell, 7.1. Namespaces and Packages
    Programming Perl, 5.2. Modules
    Programming Perl, 8.4. Programming with Style
  program : (see $ variables, $0 variable)
  protocols
    Programming Perl, 3.2.59. getprotobynumber
    Programming Perl, 3.2.65. getservbyport
  signals : Programming Perl, 6.2.1. Signals
  sockets : Programming Perl, 3.2.7. bind
  statement block labels : Perl in a Nutshell, 4.3. Statements
  subroutines
    Advanced Perl Programming, 3.3.3. Naming Anonymous Subroutines
    Learning Perl, 8.5. Private Variables in Functions
    Programming Perl, 2.3.1. Variables
    Programming Perl, 2.7. Subroutines
  translating to network addresses
    Programming Perl, 3.2.48. gethostbyname
    Programming Perl, 3.2.52. getnetbyname
  typeglobs
    Programming Perl, 2.3.6. Typeglobs and Filehandles
    Programming Perl, 2.7.1. Passing Symbol Table Entries (Typeglobs)
  usernames, passwd file entry from : Programming Perl, 3.2.62. getpwnam
  variables
    Advanced Perl Programming, 3.2.2.3. Friendly predefined variables with aliases
    Perl in a Nutshell, 4.2.4.2. Hashes
    Programming Perl, 1.2.1. Nouns
    Programming Perl, 2.3.1. Variables
    Programming Perl, 7.2.61. Symbol - Generate Anonymous Globs; Qualify Variable Names
    Programming Perl, 7.2.76. vars - Predeclare Global Variable Names
    Programming Perl, 8.4. Programming with Style
namespaces
  (see also packages)
  Learning Perl, 3.3. Variables
  Perl in a Nutshell, 4.2.4. Variables
  Perl in a Nutshell, 7.1. Namespaces and Packages
  creating safe : Programming Perl, 7.2.51. Safe - Create Safe Namespaces for Evaluating Perl Code
  importing symbols into : Advanced Perl Programming, 6.5. Importing Symbols
  privacy and : Advanced Perl Programming, 6.4. Privacy
  working with multiple : Advanced Perl Programming, 6.1. Basic Package
natural languages : Programming Perl, 1.2. Natural and Artificial Languages
natural logarithms : Perl Cookbook, 2.13. Taking Logarithms
navigation web with robots : Perl Cookbook, 20.11. Creating a Robot
navigator object (PerlScript) : Perl in a Nutshell, 20.1. Client-Side PerlScript
NDBM files : Perl Cookbook, 14.0. Introduction
NDBM_File module
  Perl in a Nutshell, 8.109. NDBM_File
  Programming Perl, 7.2.1. AnyDBM_File - Provide Framework for Multiple DBMs
  Programming Perl, 7.2.45. NDBM_File - Tied Access to NDBM Files
ne (not equal to) operator
  Learning Perl, 2.4.2. Operators for Strings
  Perl in a Nutshell, 4.5.4.2. Equality operators
  Programming Perl, 8.2.1. Universal Blunders
  examples of
    Learning Perl, 1.5.4. Guessing the Secret Word
    Learning Perl on Win32 Systems, 1.6.4. Guessing the Secret Word
nearest() (Listbox) : Perl in a Nutshell, 18.10.2. Listbox Methods
neat() (DBI) : Perl in a Nutshell, Chapter 12, Reference: neat
neat_list() (DBI) : Perl in a Nutshell, Chapter 12, Reference: neat_list
negation
  arithmetic (-) operator : Programming Perl, 2.5.5. Ideographic Unary Operators
  bitwise (~) operator : Programming Perl, 2.5.5. Ideographic Unary Operators
  logical (!) operator : Programming Perl, 2.5.5. Ideographic Unary Operators
  of character class : Programming Perl, 1.7.1. Quantifiers
negative lookahead asserion : Programming Perl, 2.4.1.4. Regular expression extensions
nested
  data structures
    Advanced Perl Programming, B.2. Nested Data Structures
    Advanced Perl Programming, 1.3. Nested Data Structures
    SWIG and : Advanced Perl Programming, 18.3. SWIG Features
  data structures, printed : Programming Perl, 8.1.1. Debugger Commands
  destruction : Programming Perl, 5.3.7. Destructors
  HTML tags : Perl Cookbook, 20.6. Extracting or Removing HTML Tags
  lists
    Programming Perl, 4.6. A Brief Tutorial: Manipulating Lists of Lists
    Programming Perl, 4.7. Data Structure Code Examples
  loops, exiting from : Learning Perl, 9.4. Labeled Blocks
  modules/packages : Advanced Perl Programming, 6.6. Nesting Packages
  packages : Programming Perl, 5.1. Packages
  subroutines
    Perl Cookbook, 10.16. Nesting Subroutines
    Learning Perl, 8.2. Invoking a User Function
Net modules
  Perl in a Nutshell, 8.110. Net::hostent
  Perl in a Nutshell, 14. Email Connectivity
  Net::DNS module : Perl Cookbook, 18.9. Program: expn and vrfy
  Net::FTP module
    Advanced Perl Programming, 12.6.1. Net::FTP
    Perl Cookbook, 18.2. Being an FTP Client
    Perl in a Nutshell, 16.2. Net::FTP
  Net::hostent module : Perl in a Nutshell, 8.110. Net::hostent
  Net::netent module : Perl in a Nutshell, 8.111. Net::netent
  Net::Netrc module : Perl in a Nutshell, 16.3. FTP Configuration with Net::Netrc
  Net::News module : Perl in a Nutshell, 15.2. Net::NNTP
  Net::NNTP module : Perl Cookbook, 18.4. Reading and Posting Usenet News Messages
  Net::Ping module
    Perl Cookbook, 18.7. Pinging a Machine
    Perl in a Nutshell, 8.112. Net::Ping
    Programming Perl, 7.2.46. Net::Ping - Check Whether a Host Is Online
  Net::POP3 module
    Advanced Perl Programming, 12.6.2. Net::POP3
    Perl Cookbook, 18.5. Reading Mail with POP3
    Perl in a Nutshell, 14.1.3. Retrieving Email with Net::POP3
  Net::protoent module : Perl in a Nutshell, 8.113. Net::protoent
  Net::servent module : Perl in a Nutshell, 8.114. Net::servent
  Net::SMTP module : Perl in a Nutshell, 14.1.1. Send Email with Net::SMTP
  Net::SNPP and Net::Time modules : Perl in a Nutshell, 14. Email Connectivity
Net::Telnet : Perl Cookbook, 18.6. Simulating Telnet from a Program
Net::Whois module : Perl Cookbook, 18.8. Using Whois to Retrieve Information from the InterNIC
net use command : Learning Perl on Win32 Systems, 12.5. Reading a Directory Handle
net view command : Learning Perl on Win32 Systems, 14.6. Exercises
NetAdmin module
  Learning Perl on Win32 Systems, B.4. Win32 Extensions
  Learning Perl on Win32 Systems, 16.1. Getting User and Machine Information
netloc() (URI::URL) : Perl in a Nutshell, Chapter 17, Reference: netloc
netlock program : Perl Cookbook, 7.21. Program: netlock
.netrc file : Perl in a Nutshell, 16.3. FTP Configuration with Net::Netrc
netresource data structure : Perl in a Nutshell, 19.11. Win32::NetResource
NetResource module
  Learning Perl on Win32 Systems, B.4. Win32 Extensions
  Learning Perl on Win32 Systems, 12.5. Reading a Directory Handle
Netscape history.db file : Perl Cookbook, 14.11. Program: ggh - Grep Netscape Global History
:netscape method group
  Learning Perl, 19.5. Less Typing
  Perl in a Nutshell, 10.2. Importing Method Groups
NetShareAdd() (Win32::NetResource) : Perl in a Nutshell, Chapter 19, Reference: NetShareAdd
NetShareCheck() (Win32::NetResource) : Perl in a Nutshell, Chapter 19, Reference: NetShareCheck
NetShareDel() (Win32::NetResource) : Perl in a Nutshell, Chapter 19, Reference: NetShareDel
NetShareGetInfo() (Win32::NetResource) : Perl in a Nutshell, Chapter 19, Reference: NetShareGetInfo
NetShareSetInfo() (Win32::NetResource) : Perl in a Nutshell, Chapter 19, Reference: NetShareSetInfo
netstat : Learning Perl on Win32 Systems, 14.3. Using Processes as Filehandles
network addresses, translating to names
  Programming Perl, 3.2.47. gethostbyaddr
  Programming Perl, 3.2.51. getnetbyaddr
Network News Transfer Protocol (NNTP) : Perl in a Nutshell, 15. Usenet News
networking
  Advanced Perl Programming, 12. Networking with Sockets
  Learning Perl on Win32 Systems, C. Networking Clients
  bidirectional communication : Advanced Perl Programming, 12.2.3. Bidirectional Communications
  email : Perl in a Nutshell, 14. Email Connectivity
  fetching information, function for : Perl in a Nutshell, 5.1. Perl Functions by Category
  handling multiple clients : Advanced Perl Programming, 12.3. Handling Multiple Clients
  IO objects and filehandles : Advanced Perl Programming, 12.5. IO Objects and Filehandles
  RPC module : Advanced Perl Programming, 13.2. Remote Procedure Calls (RPC)
  server administration : Perl in a Nutshell, 19.10. Win32::NetAdmin
  servers : Advanced Perl Programming, 12.4. Real-World Servers
  sockets : Perl in a Nutshell, 13. Sockets
    built-in functions for : Perl in a Nutshell, 13.1. Built-in Socket Functions
    IO::Socket module : Perl in a Nutshell, 13.2. The IO::Socket Module
    IO::Socket::INET subclass : Perl in a Nutshell, 13.2.4. IO::Socket::INET Reference
    IO::Socket::UNIX subclass : Perl in a Nutshell, 13.2.5. IO::Socket::UNIX Reference
  Usenet news : Perl in a Nutshell, 15. Usenet News
networks file : (see /etc/networks file)
new()
  Perl Cookbook, 13.0. Introduction
  Learning Perl, 19.8.2. Objects in CGI.pm
  Programming Perl, 3.2.98. new
  Programming Perl, 7.2.33. FileHandle - Supply Object Methods for Filehandles
  Adaptor::DBI module
    Advanced Perl Programming, 11.2.2. Object Encapsulation
    Advanced Perl Programming, 11.3.2. Adaptor::DBI
  Adaptor::File module : Advanced Perl Programming, 11.2.2. Object Encapsulation
  HTML modules
    HTML::Element module : Perl in a Nutshell, 17.4.2. HTML::Element
    HTML::FormatPS module : Perl in a Nutshell, 17.4.4. HTML::FormatPS
    HTML::Parser module : Perl in a Nutshell, 17.4.1. HTML::Parser
  HTTP modules
    HTTP::Cookies module : Perl in a Nutshell, 17.3.6. HTTP::Cookies
    HTTP::Cookies::Netscape module : Perl in a Nutshell, 17.3.6.1. HTTP::Cookies::Netscape
    HTTP::Daemon module : Perl in a Nutshell, 17.3.7. HTTP::Daemon
    HTTP::Headers module : Perl in a Nutshell, 17.3.3. HTTP::Headers
    HTTP::Request module : Perl in a Nutshell, 17.3.1. HTTP::Request
    HTTP::Response module : Perl in a Nutshell, 17.3.2. HTTP::Response
  IO::Socket module : Advanced Perl Programming, 12.5. IO Objects and Filehandles
  LWP::RobotUA module : Perl in a Nutshell, 17.2.1. LWP::RobotUA sections
  Mail modules
    Mail::Address module : Perl in a Nutshell, Chapter 14, Reference: new
    Mail::Folder module : Perl in a Nutshell, Chapter 14, Reference: new
    Mail::Internet module : Perl in a Nutshell, Chapter 14, Reference: new
    Mail::Mailer module : Perl in a Nutshell, Chapter 14, Reference: new
    Mail::POP3Client module : Perl in a Nutshell, Chapter 14, Reference: new
    Mail::Send module : Perl in a Nutshell, Chapter 14, Reference: new
  Net modules
    Net::FTP module : Perl in a Nutshell, Chapter 16, Reference: new
    Net::NNTP module : Perl in a Nutshell, Chapter 15, Reference: new
    Net::POP3 module : Perl in a Nutshell, Chapter 14, Reference: new
    Net::SMTP module : Perl in a Nutshell, Chapter 14, Reference: new
  News::Newsrc module : Perl in a Nutshell, Chapter 15, Reference: new
  URI::URL module : Perl in a Nutshell, 17.5.2. URI::URL
  Win32 modules
    Win32::ChangeNotification module : Perl in a Nutshell, 19.3. Win32::ChangeNotification
    Win32::Console module : Perl in a Nutshell, 19.2. Win32::Console
    Win32::EventLog module : Perl in a Nutshell, 19.4. Win32::Eventlog
    Win32::Internet module
      Perl in a Nutshell, 19.7. Win32::Internet
      Perl in a Nutshell, 19.7.1. General Internet Methods
    Win32::Mutex module : Perl in a Nutshell, 19.9. Win32::Mutex
    Win32::OLE module : Perl in a Nutshell, Chapter 19, Reference: new
    Win32::OLE::Enum module : Perl in a Nutshell, Chapter 19, Reference: new
    Win32::OLE::Variant module : Perl in a Nutshell, 19.18.4. Win32::OLE::Variant
    Win32::Semaphore module : Perl in a Nutshell, 19.14. Win32::Semaphore
    Win32::Shortcut module : Perl in a Nutshell, 19.16. Win32::Shortcut
new_from_fd() : Programming Perl, 7.2.33. FileHandle - Supply Object Methods for Filehandles
new_tmpfile() (IO::File) : Perl Cookbook, 7.5. Creating Temporary Files
newgroups() (Net::NNTP) : Perl in a Nutshell, Chapter 15, Reference: newgroups
newlines : (see line breaks; whitespace)
  anon-matching by dot and : Learning Perl, 7.3.1. Single-Character Patterns
  boundary assertions and : Programming Perl, 2.4.1.2. The rules of regular expression matching
  in format value, and @* field : Learning Perl, 11.4.3. Multiline Fields
  non-matching by dot : Learning Perl on Win32 Systems, 7.3.1. Single-Character Patterns
  removing
    Learning Perl, 2.7. <STDIN> as a Scalar Value
    Programming Perl, 1.4. Filehandles
  in string literals : Programming Perl, 2.3.2.2. String literals
newnews() (Net::NNTP) : Perl in a Nutshell, Chapter 15, Reference: newnews
news
  Perl Cookbook, 18.4. Reading and Posting Usenet News Messages
  Perl in a Nutshell, 15. Usenet News
  Net::News module : Perl in a Nutshell, 15.2. Net::NNTP
  News::Newsrc module : Perl in a Nutshell, 15.3. The News::Newsrc Module
  NNTP protocol : Perl in a Nutshell, 15.1. The NNTP Protocol
newsgroups
  listing available : Perl in a Nutshell, 15.1. The NNTP Protocol
  Perl-related
    Learning Perl on Win32 Systems, 1.4. Support
    Perl in a Nutshell, 1.4.1. The comp.lang.perl.* Newsgroups
    Programming Perl, Usenet Newsgroups
newsgroups() (Net::NNTP) : Perl in a Nutshell, Chapter 15, Reference: newsgroups
.newsrc file : Perl in a Nutshell, 15.3. The News::Newsrc Module
next operator
  Learning Perl, 9.2. The next Statement
  Perl in a Nutshell, Chapter 5, Reference: next
  Perl in a Nutshell, Chapter 15, Reference: next
  Perl in a Nutshell, 4.3.1.1. while loops
  Perl in a Nutshell, 4.3.1.5. Loop control
  Programming Perl, 1.6.2.4. Breaking out: next and last
  Programming Perl, 2.6.4.4. Loop control
  Programming Perl, 3.2.99. next
  example of : Learning Perl, A.17. Chapter 18, Converting Other Languages to Perl
  next if construct : Programming Perl, 8.3.1. Time Efficiency
Next() (Win32::OLE::Enum) : Perl in a Nutshell, Chapter 19, Reference: Next
next_labeled_message() (Mail::Folder) : Perl in a Nutshell, Chapter 14, Reference: next_labeled_message
next_message() (Mail::Folder) : Perl in a Nutshell, Chapter 14, Reference: next_message
NEXTKEY function
  Advanced Perl Programming, 9.3. Tying Hashes
  Programming Perl, 5.4.3. Tying Hashes
NFA (nondeterministic finite automata)
  Perl Cookbook, 6.0. Introduction
  Programming Perl, 2.4.1.2. The rules of regular expression matching
$nlink file statistic : Programming Perl, 3.2.159. stat
nlst() (Net::FTP) : Perl in a Nutshell, Chapter 16, Reference: nlst
NNTP (Network News Transfer Protocol) : Perl in a Nutshell, 15. Usenet News
nntppost() (Mail::Internet) : Perl in a Nutshell, Chapter 14, Reference: nntppost
nntpstat() (Net::NNTP) : Perl in a Nutshell, Chapter 15, Reference: nntpstat
no declaration
  Perl in a Nutshell, Chapter 5, Reference: no
  Programming Perl, 2.6.9. Pragmas
  Programming Perl, 3.2.100. no
no_proxy() (LWP::UserAgent) : Perl in a Nutshell, Chapter 17, Reference: no_proxy
no_visits() (LWP::RobotUA) : Perl in a Nutshell, Chapter 17, Reference: no_visits
NodeName function : Learning Perl on Win32 Systems, 16.1. Getting User and Machine Information
NodeName module : Learning Perl on Win32 Systems, B.4. Win32 Extensions
noecho input mode : Perl Cookbook, 15.10. Reading Passwords
NOFILE constant : Perl Cookbook, 7.17. Caching Open Output Filehandles
nomethod operator : Programming Perl, 7.2.48.4. No method
non-blocking I/O : Perl Cookbook, 7.14. Doing Non-Blocking I/O
non-forking servers : Perl Cookbook, 17.13. Non-Forking Servers
non-greedy matching
  Perl Cookbook, 6.0. Introduction
  Perl Cookbook, 6.15. Greedy and Non-Greedy Matches
  Perl in a Nutshell, 4.6.6. Quantifiers
nondeterministic finite automata (NFA)
  Perl Cookbook, 6.0. Introduction
  Programming Perl, 2.4.1.2. The rules of regular expression matching
none index (Menu widget) : Perl in a Nutshell, 18.15.1. Menu Indexes
nonforker program (example) : Perl Cookbook, 17.13. Non-Forking Servers
nonnblocking filehandles : Advanced Perl Programming, 12.3.3. Nonblocking Filehandles
NonStop option (PERLDB_OPTS) : Perl in a Nutshell, 6.4. Customizing the Debugger
not (!) operator : Programming Perl, 2.5.5. Ideographic Unary Operators
not equal to (!=) operator : Programming Perl, 2.5.12. Equality Operators
NOT functionality in regular expressions : Perl Cookbook, 6.17. Expressing AND, OR, and NOT in a Single Pattern
noTTY option (PERLDB_OPTS) : Perl in a Nutshell, 6.4. Customizing the Debugger
nounder_demo program (example) : Perl Cookbook, 13.15. Creating Magic Variables with tie
nouns : Programming Perl, 1.2.1. Nouns
nph() (CGI.pm) : Perl in a Nutshell, Chapter 10, Reference: nph
$NR variable
  Perl in a Nutshell, 4.4.1. Global Special Variables
  Programming Perl, 2.9.3. Global Special Variables
  Programming Perl, 7.2.13. English - Use English or awk Names for Punctuation Variables
nstore() : Perl Cookbook, 11.13. Storing Data Structures to Disk
NTFS file permissions : Perl in a Nutshell, 19.6. Win32::FileSecurity
NUL characters, and DBM accesses : Learning Perl, 17.3. Using a DBM Hash
null
  filehandle
    angle operator and : Programming Perl, 2.3.7.2. Line input (angle) operator
  list : Programming Perl, 2.3.4. List Values and Arrays
  scalars : Programming Perl, 2.3.3.2. Boolean context
NULLABLE attribute (DBI) : Perl in a Nutshell, 12.2.3. Database Handles and Statement Handles
NUM_OF_FIELDS attribute (DBI) : Perl in a Nutshell, 12.2.3. Database Handles and Statement Handles
NUM_OF_PARAMS attribute (DBI) : Perl in a Nutshell, 12.2.3. Database Handles and Statement Handles
numbers
  (see also values)
  Perl Cookbook, 1.4. Converting Between ASCII Characters and Values
  Perl Cookbook, 2.0. Introduction
  Learning Perl on Win32 Systems, 2.1. What Is Scalar Data?
  Perl in a Nutshell, 4.2.1. Numbers
  Programming Perl, 2.3.2.1. Numeric literals
  adding commas to : Perl Cookbook, 2.17. Putting Commas in Numbers
  automatic conversion to strings : Learning Perl, 2.4.4. Conversion Between Numbers and Strings
  for commands, debugger and : Programming Perl, 8.1.2. Using the Debugger
  comparing
    Programming Perl, 1.5.6. Comparison Operators
    Programming Perl, 6.4.2.2. a2p
  complex (imaginary)
    Perl Cookbook, 2.15. Using Complex Numbers
    Programming Perl, 7.2.44. Math::Complex - Complex Numbers Package
  converting binary with decimal : Perl Cookbook, 2.4. Converting Between Binary and Decimal
  converting with ASCII characters : Perl Cookbook, 1.4. Converting Between ASCII Characters and Values
  \d (digit) character class
    Learning Perl, 7.3.1. Single-Character Patterns
    Perl in a Nutshell, 4.6.4. Character Classes
    Programming Perl, 1.7. Regular Expressions
  \D (nondigit) character class : Perl in a Nutshell, 4.6.4. Character Classes
  decimal places, controlling : Perl Cookbook, 13.14. Overloading Operators
  definition of : Learning Perl, 2.1. What Is Scalar Data?
  digits in names : Programming Perl, 2.3.1. Variables
  fixed-precision numeric fields : Perl in a Nutshell, 4.10. Formats
  floating-point
    Perl Cookbook, 2.0. Introduction
    Perl Cookbook, 2.2. Comparing Floating-Point Numbers
    Perl Cookbook, 2.3. Rounding Floating-Point Numbers
    Programming Perl, 7.2.42. Math::BigFloat - Arbitrary-Length, Floating-Point Math Package
  functions for : Perl in a Nutshell, 5.1. Perl Functions by Category
  hexadecimal : (see hexadecimal numbers)
  integers
    Perl Cookbook, 2.5. Operating on a Series of Integers
    Programming Perl, 7.2.38. integer - Do Arithmetic in Integer Instead of Double
    Programming Perl, 7.2.43. Math::BigInt - Arbitrary-Length Integer Math Package
  justifying by decimal point : Programming Perl, 2.8. Formats
  large, underscore and : Programming Perl, 2.3.2.1. Numeric literals
  line (__LINE__ token)
    Perl Cookbook, 10.4. Determining Current Function Name
    Perl in a Nutshell, 4.4.4. Global Special Constants
    Programming Perl, 2.3.2.7. Other literal tokens
  logarithms : Perl Cookbook, 2.13. Taking Logarithms
  matrix multiplication : Perl Cookbook, 2.14. Multiplying Matrices
  octal : (see octal characters)
  for pages : Programming Perl, 2.9.2. Per-Filehandle Special Variables
  plural words based on : Perl Cookbook, 2.18. Printing Correct Plurals
  port, getting name for/from
    Programming Perl, 3.2.64. getservbyname
    Programming Perl, 3.2.65. getservbyport
  primes, calculating : Perl Cookbook, 2.19. Program: Calculating Prime Factors
  protocol : Programming Perl, 3.2.59. getprotobynumber
  random
    Perl Cookbook, 2.0. Introduction
    Perl Cookbook, 2.7. Generating Random Numbers
    Programming Perl, 3.2.115. rand
    Programming Perl, 3.2.158. srand
    biasing : Perl Cookbook, 2.10. Generating Biased Random Numbers
  roman numerals : Perl Cookbook, 2.6. Working with Roman Numerals
  sorting numerically : Learning Perl, 15.4. Advanced Sorting
  strings as valid numbers : Perl Cookbook, 2.1. Checking Whether a String Is a Valid Number
  trigonometry : Perl Cookbook, 2.11. Doing Trigonometry in Degrees, not Radians
  truncating with int : Programming Perl, 3.2.76. int
numeric fields (in formats) : Learning Perl, 11.4.2. Numeric Fields
numeric operators : Learning Perl, 2.4.1. Operators for Numbers
NVs (doubles) : Advanced Perl Programming, 20.3.1. Scalar Values

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