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Index: N

command (debugger) : Debugger Commands
-n switch, perl : Switches
named pipes : Named pipes
named unary operators
- Filename globbing operator
- Named Unary and File Test Operators
names
- arrays : Variables
- capitalization conventions : Variables
- commands : Verbs
- current working directory : Cwd - Get Pathname of Current Working Directory
- file : Other literal tokens
- for files : (see filenames)
- format : (see format, names)
- functions : Verbs
- getting from network addresses
- - gethostbyaddr
  - getnetbyaddr
- getting from port number : getservbyname
- global variables : vars - Predeclare Global Variable Names
- hashes : Variables
- labels and filehandles : Variables
- modules : Modules
- modules/packages : Developing with Style
- program : (see $ variables, $0 variable)
- protocol : getprotobynumber
- - getting from port number : getservbyport
- signals : Signals
- sockets : bind
- subroutine : Subroutines
- subroutines : Variables
- translating to network addresses
- - gethostbyname
  - getnetbyname
- typeglobs
- - Typeglobs and Filehandles
  - Passing Symbol Table Entries (Typeglobs)
- usernames, passwd file entry from : getpwnam
- variable
- - Symbol - Generate Anonymous Globs; Qualify Variable Names
  - Developing with Style
- variables
- - Nouns
  - Variables
namespace : (see packages)
namespaces, creating safe : Safe - Create Safe Namespaces for Evaluating Perl Code
natural languages : Natural and Artificial Languages
NDBM_File module : AnyDBM_File - Provide Framework for Multiple DBMs
NDBM_File mofule : NDBM_File - Tied Access to NDBM Files
ne operator : Universal Blunders
negation
- arithmetic (-) operator : Ideographic Unary Operators
- bitwise (~) operator : Ideographic Unary Operators
- logical (!) operator : Ideographic Unary Operators
- of character class : Quantifiers
negative lookahead asserion : Regular expression extensions
nested
- data structures, printed : Debugger Commands
- destruction : Destructors
- lists
- - Brief Tutorial: Manipulating Lists of Lists
  - Data Structure Code Examples
- packages : Packages
Net::Ping module : Net::Ping - Check Whether a Host Is Online
network addresses, translating to names
- gethostbyaddr
- getnetbyaddr
networks file : (see /etc/networks file)
new method : new
new() : FileHandle - Supply Object Methods for Filehandles
new_from_fd() : FileHandle - Supply Object Methods for Filehandles
newlines
- boundary assertions and : The rules of regular expression matching
- removing : Filehandles
- in string literals : String literals
newsgroups : Usenet Newsgroups
next operator
- Breaking out: next and last
- Loop control
- next
- next if construct : Time Efficiency
NEXTKEY method : Tying Hashes
NFA (nondeterministic finite-state automaton) : The rules of regular expression matching
$nlink file statistic : stat
no declaration
- Pragmas
- no
nomethod operator : No method
nondeterministic finite-state automaton (NFA) : The rules of regular expression matching
not (!) operator : Ideographic Unary Operators
not equal to (!=) operator : Equality Operators
nouns : Nouns
$NR : (see $ variables, $. variable)
null
- filehandle
- - angle operator and : Line input (angle) operator
- list : List Values and Arrays
- scalars : Boolean context
numbers
- for commands, debugger and : Using the Debugger
- comparing in awk : p
- comparison operators for : Comparison Operators
- complex : Math::Complex - Complex Numbers Package
- \d (for digit) : Regular Expressions
- digits in names : Variables
- floating-point : Math::BigFloat - Arbitrary-Length, Floating-Point Math Package
- hexadecimal
- - (see hexadecimal numbers)
  - The rules of regular expression matching
  - hex
- integers
- - integer - Do Arithmetic in Integer Instead of Double
  - Math::BigInt - Arbitrary-Length Integer Math Package
- justifying by decimal point : Formats
- large, underscore and : Numeric literals
- line (__LINE__ token) : Other literal tokens
- octal
- - (see octal characters)
  - The rules of regular expression matching
  - oct
- for pages : Per-Filehandle Special Variables
- port, getting name for/from
- - getservbyname
  - getservbyport
- protocol : getprotobynumber
- random
- - rand
  - srand
- truncating with int : int
numeric literals : Numeric literals

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