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Index: N
- \n: 25.1. Newlines (Programming Perl)
- -n switch, perl: 7.7. Writing a Filter (Perl Cookbook)
- 3.2. Command-Line Options (Perl in a Nutshell)
- -n (loop) command-line switch: 19.1.3. Switches (Programming Perl)
- n command (debugger): Chapter 6, Reference: n (Perl in a Nutshell)
- n index
- Nagle's algorithm: 17.3. Communicating over TCP (Perl Cookbook)
- NAME attribute (DBI): 12.2.3. Database Handles and Statement Handles (Perl in a Nutshell)
- name() (Mail::Address): Chapter 14, Reference: name (Perl in a Nutshell)
- name services (see TCP/IP, name services)
- named parameters (CGI): 10.4. Named Parameters (Perl in a Nutshell)
- named pipes: 16.11. Making a Process Look Like a File with Named Pipes (Perl Cookbook)
- 16.22. Program: sigrand (Perl Cookbook)
- named unary operators: 2.11.3. Filename Globbing Operator (Programming Perl)
- character: 2.6.2. String Literals (Programming Perl)
- names: 2.5. Names (Programming Perl)
- arrays: 2.4. Variables (Programming Perl)
- attributes, subroutines: 6.5.1. The locked and method Attributes (Programming Perl)
- capitalization conventions: 2.5. Names (Programming Perl)
- classes, distinguishing from subroutines: 12.3.4. Package-Quoted Classes (Programming Perl)
- commands: 1.2.2. Verbs (Programming Perl)
- constructors: 12.4.2. Initializers (Programming Perl)
- current subroutines: 10.4. Determining Current Function Name (Perl Cookbook)
- file: 2.6.8. Other Literal Tokens (Programming Perl)
- for files==>filenames: 29.2.128. rename (Programming Perl)
- format (see format names)
- formats associated with filehandles: 7. Formats (Programming Perl)
- functions: 1.2.2. Verbs (Programming Perl)
- getting from network addresses: 29.2.47. gethostbyaddr (Programming Perl)
- group names: 29.2.46. getgrnam (Programming Perl)
- hashes: 1.3. Nested Data Structures (Advanced Perl Programming)
- 2.4. Variables (Programming Perl)
- hashes, storing in: 1.2.1.2. Pluralities (Programming Perl)
- hostnames, translating to network addresses: 29.2.48. gethostbyname (Programming Perl)
- identifiers vs.: 2.5. Names (Programming Perl)
- labels and filehandles: 2.5. Names (Programming Perl)
- login (see login names)
- lookups of: 2.5.1. Name Lookups (Programming Perl)
- loop labels: 4.3.1.5. Loop control (Perl in a Nutshell)
- methods, tied variables: 14. Tied Variables (Programming Perl)
- modules: 11.1. Using Modules (Programming Perl)
- modules/packages: 6.2. Packages and Files (Advanced Perl Programming)
- 7.1. Namespaces and Packages (Perl in a Nutshell)
- 24.3. Programming with Style (Programming Perl)
- network addresses, getting from: 29.2.51. getnetbyaddr (Programming Perl)
- packages: 10. Packages (Programming Perl)
- parameters, not requiring: 6.2.1. Tricks with Parameter Lists (Programming Perl)
- ports, getting from number: 29.2.64. getservbyname (Programming Perl)
- program (see $0 variable)
- protocols, getting from port numbers: 29.2.65. getservbyport (Programming Perl)
- protocols, translating to/from numbers: 29.2.58. getprotobyname (Programming Perl)
- scope, confining to: 4.8.1. Scoped Variable Declarations (Programming Perl)
- signals: 16.1. Signals (Programming Perl)
- statement block labels: 4.3. Statements (Perl in a Nutshell)
- subroutines: 3.3.3. Naming Anonymous Subroutines (Advanced Perl Programming)
- symbol tables: 10.1. Symbol Tables (Programming Perl)
- temporary files, generating: 23.2.3. Temporary Files (Programming Perl)
- translating to network addresses: 29.2.52. getnetbyname (Programming Perl)
- typeglobs: 2.10. Typeglobs and Filehandles (Programming Perl)
- users: 29.2.62. getpwnam (Programming Perl)
- variable: 24.3. Programming with Style (Programming Perl)
- variables: 3.2.2.3. Friendly predefined variables with aliases (Advanced Perl Programming)
- 4.2.4.2. Hashes (Perl in a Nutshell)
- 1.2.1. Variable Syntax (Programming Perl)
- 2.4. Variables (Programming Perl)
- namespaces
- 4.2.4. Variables (Perl in a Nutshell)
- 7.1. Namespaces and Packages (Perl in a Nutshell)
- 2.5. Names (Programming Perl)
- access, restricting with Safe module: 23.3.1.1. Restricting namespace access (Programming Perl)
- encapsulation based on: 14.6. Tie Modules on CPAN (Programming Perl)
- for packages: 1.2.1.4. Simplicities (Programming Perl)
- importing symbols into: 6.5. Importing Symbols (Advanced Perl Programming)
- modules and: 11.2.1. Module Privacy and the Exporter (Programming Perl)
- privacy and: 6.4. Privacy (Advanced Perl Programming)
- working with multiple: 6.1. Basic Package (Advanced Perl Programming)
- (see also packages)
- naming, socket: 29.2.5. bind (Programming Perl)
- natural languages: 1.2. Natural and Artificial Languages (Programming Perl)
- natural logarithms: 2.13. Taking Logarithms (Perl Cookbook)
- navigation web with robots: 20.11. Creating a Robot (Perl Cookbook)
- navigator object (PerlScript): 20.1. Client-Side PerlScript (Perl in a Nutshell)
- NDBM files: 14.0. Introduction (Perl Cookbook)
- NDBM_File module: 8.109. NDBM_File (Perl in a Nutshell)
- 32.1.10. DBM Interfaces (Programming Perl)
- ne (not equal to) operator: 4.5.4.2. Equality operators (Perl in a Nutshell)
- ne operator: 24.1.1. Universal Blunders (Programming Perl)
- nearest() (Listbox): 18.10.2. Listbox Methods (Perl in a Nutshell)
- neat() (DBI): Chapter 12, Reference: neat (Perl in a Nutshell)
- neat_list() (DBI): Chapter 12, Reference: neat_list (Perl in a Nutshell)
- needspace script: 2.4. Walking the Filesystem Using the File::Find Module (Perl for System Administration)
- negation
- arithmetic (-)operator: 3.5. Ideographic Unary Operators (Programming Perl)
- bitwise (~) operator: 3.5. Ideographic Unary Operators (Programming Perl)
- character classes: 5.4.1. Custom Character Classes (Programming Perl)
- 5.4.2. Classic Perl Character Class Shortcuts (Programming Perl)
- logical (!) operator: 3.5. Ideographic Unary Operators (Programming Perl)
- of character class: 1.7.1. Quantifiers (Programming Perl)
- POSIX character classes: 5.4.4. POSIX-Style Character Classes (Programming Perl)
- negation operator (!), overloading: 13.3. Overloadable Operators (Programming Perl)
- negative array subscripts, counting from end of array: 24.1.5. Previous Perl Traps (Programming Perl)
- negative lookahead assertions: ?/ (Programming Perl) 5.9.4. The Little Engine That /Could(n't)
- 5.10.1. Lookaround Assertions (Programming Perl)
- negative subscripts in Perl: 2.3. Built-in Data Types (Programming Perl)
- nested
- arrays: 9.1. Arrays of Arrays (Programming Perl)
- data structures: B.2. Nested Data Structures (Advanced Perl Programming)
- HTML tags: 20.6. Extracting or Removing HTML Tags (Perl Cookbook)
- modules/packages: 6.6. Nesting Packages (Advanced Perl Programming)
- subroutines: 10.16. Nesting Subroutines (Perl Cookbook)
- net command (Windows NT/2000): 3.2.1. NT/2000 User Identity Storage and Access (Perl for System Administration)
- Net modules: 8.110. Net::hostent (Perl in a Nutshell)
- 14. Email Connectivity (Perl in a Nutshell)
- Net::DNS module: 18.9. Program: expn and vrfy (Perl Cookbook)
- Net::FTP module: 12.6.1. Net::FTP (Advanced Perl Programming)
- 18.2. Being an FTP Client (Perl Cookbook)
- 16.2. Net::FTP (Perl in a Nutshell)
- Net::hostent module: 8.110. Net::hostent (Perl in a Nutshell)
- Net::netent module: 8.111. Net::netent (Perl in a Nutshell)
- Net::Netrc module: 16.3. FTP Configuration with Net::Netrc (Perl in a Nutshell)
- Net::News module: 15.2. Net::NNTP (Perl in a Nutshell)
- Net::NNTP module: 18.4. Reading and Posting Usenet News Messages (Perl Cookbook)
- Net::Ping module: 18.7. Pinging a Machine (Perl Cookbook)
- 8.112. Net::Ping (Perl in a Nutshell)
- Net::POP3 module: 12.6.2. Net::POP3 (Advanced Perl Programming)
- 18.5. Reading Mail with POP3 (Perl Cookbook)
- 14.1.3. Retrieving Email with Net::POP3 (Perl in a Nutshell)
- Net::protoent module: 8.113. Net::protoent (Perl in a Nutshell)
- Net::servent module: 8.114. Net::servent (Perl in a Nutshell)
- Net::SMTP module: 14.1.1. Send Email with Net::SMTP (Perl in a Nutshell)
- Net::SNPP and Net::Time modules: 14. Email Connectivity (Perl in a Nutshell)
- Net\:\:DNS module: 10.1.2. Network Service Changes (Perl for System Administration)
- Net\:\:Finger module: 6.2. Finger: A Simple Directory Service (Perl for System Administration)
- Net\:\:LDAP module: 6.4.2. The Initial LDAP Connection (Perl for System Administration)
- 6.4.5. Adding Entries with LDIF (Perl for System Administration)
- 6.4.6. Adding Entries with Standard LDAP Operations (Perl for System Administration)
- 6.4.8. Modifying Entry Names (Perl for System Administration)
- netmail95 program: 8.1.1. Getting sendmail (or Similar Mail Transport Agent) (Perl for System Administration)
- netloc() (URI::URL): Chapter 17, Reference: netloc (Perl in a Nutshell)
- netlock program: 7.21. Program: netlock (Perl Cookbook)
- .netrc file: 16.3. FTP Configuration with Net::Netrc (Perl in a Nutshell)
- Net::netent module: 29.2.51. getnetbyaddr (Programming Perl)
- 32.1.8. Networking and Interprocess Communication (Programming Perl)
- netnews: 22.1. The CPAN modules Directory (Programming Perl)
- (see also Usenet)
- Net::Ping module: 32.1.8. Networking and Interprocess Communication (Programming Perl)
- Net\:\:NIS module: 5.2. NIS, NIS+, and WINS (Perl for System Administration)
- Net\:\:NISPlus module: 5.2.1. NIS+ (Perl for System Administration)
- NetPacket modules: 10.4.1. Perl Saves the Day (Perl for System Administration)
- Net\:\:Pcap module: 10.4.1. Perl Saves the Day (Perl for System Administration)
- Net\:\:PcapUtils module: 10.4.1. Perl Saves the Day (Perl for System Administration)
- Net\:\:Ping module: 10.4.1. Perl Saves the Day (Perl for System Administration)
- Net::proto module: 29.2.59. getprotobynumber (Programming Perl)
- Net::protoent module: 32.1.8. Networking and Interprocess Communication (Programming Perl)
- netresource data structure: 19.11. Win32::NetResource (Perl in a Nutshell)
- Netscape history.db file: 14.11. Program: ggh - Grep Netscape Global History (Perl Cookbook)
- :netscape method group: 10.2. Importing Method Groups (Perl in a Nutshell)
- Net::servent module: 32.1.8. Networking and Interprocess Communication (Programming Perl)
- NetShareAdd() (Win32::NetResource): Chapter 19, Reference: NetShareAdd (Perl in a Nutshell)
- NetShareCheck() (Win32::NetResource): Chapter 19, Reference: NetShareCheck (Perl in a Nutshell)
- NetShareDel() (Win32::NetResource): Chapter 19, Reference: NetShareDel (Perl in a Nutshell)
- NetShareGetInfo() (Win32::NetResource): Chapter 19, Reference: NetShareGetInfo (Perl in a Nutshell)
- NetShareSetInfo() (Win32::NetResource): Chapter 19, Reference: NetShareSetInfo (Perl in a Nutshell)
- Net\:\:SMTP module: 8.1.3. Speaking to the Mail Protocols Directly (Perl for System Administration)
- Net\:\:SNMP module: 10.3.1. Using SNMP from Perl (Perl for System Administration)
- Net::Telnet: 18.6. Simulating Telnet from a Program (Perl Cookbook)
- Net\:\:Telnet module: 8.1.3. Speaking to the Mail Protocols Directly (Perl for System Administration)
- Net::Whois module: 18.8. Using Whois to Retrieve Information from the InterNIC (Perl Cookbook)
- Network Information Center (NIC): 5.1. Host Files (Perl for System Administration)
- Network News Transfer Protocol (NNTP): 15. Usenet News (Perl in a Nutshell)
- network ports, listing open: 4.4.1. Tracking Operations on Windows NT/2000 (Perl for System Administration)
- networking: 12. Networking with Sockets (Advanced Perl Programming)
- bidirectional communication: 12.2.3. Bidirectional Communications (Advanced Perl Programming)
- clients: 16.5.1. Networking Clients (Programming Perl)
- email: 14. Email Connectivity (Perl in a Nutshell)
- fetching information, function for: 5.1. Perl Functions by Category (Perl in a Nutshell)
- handling multiple clients: 12.3. Handling Multiple Clients (Advanced Perl Programming)
- IO objects and filehandles: 12.5. IO Objects and Filehandles (Advanced Perl Programming)
- modules for: 32.1.8. Networking and Interprocess Communication (Programming Perl)
- modules implementing network protocols: 22.1. The CPAN modules Directory (Programming Perl)
- network addresses, translating to names: 29.2.51. getnetbyaddr (Programming Perl)
- network filesystems (see NFS)
- network information, functions for retrieving: 29.1. Perl Functions by Category (Programming Perl)
- RPC module: 13.2. Remote Procedure Calls (RPC) (Advanced Perl Programming)
- server administration: 19.10. Win32::NetAdmin (Perl in a Nutshell)
- servers: 12.4. Real-World Servers (Advanced Perl Programming)
- 16.5.2. Networking Servers (Programming Perl)
- services, Perl module for interacting with: 22.1. The CPAN modules Directory (Programming Perl)
- sockets: 13. Sockets (Perl in a Nutshell)
- built-in functions for: 13.1. Built-in Socket Functions (Perl in a Nutshell)
- IO::Socket module: 13.2. The IO::Socket Module (Perl in a Nutshell)
- IO::Socket::INET subclass: 13.2.4. IO::Socket::INET Reference (Perl in a Nutshell)
- IO::Socket::UNIX subclass: 13.2.5. IO::Socket::UNIX Reference (Perl in a Nutshell)
- Usenet news: 15. Usenet News (Perl in a Nutshell)
- Win32 network modules: 32.1.20. Microsoft-Related Modules (Programming Perl)
- networking modules: 16.5. Sockets (Programming Perl)
- networks
- administering with NIS: 5.2. NIS, NIS+, and WINS (Perl for System Administration)
- changes to, detecting: 10.1.2. Network Service Changes (Perl for System Administration)
- directory services and: 6.1. What's a Directory? (Perl for System Administration)
- pinging/sniffing from Perl: 10.4.1. Perl Saves the Day (Perl for System Administration)
- networks file (see /etc/networks file)
- Net\:\:XWhois module: 6.3. The WHOIS Directory Service (Perl for System Administration)
- new(): 13.0. Introduction (Perl Cookbook)
- Adaptor::DBI module: 11.2.2. Object Encapsulation (Advanced Perl Programming)
- 11.3.2. Adaptor::DBI (Advanced Perl Programming)
- Adaptor::File module: 11.2.2. Object Encapsulation (Advanced Perl Programming)
- HTML modules
- HTTP modules
- HTTP::Cookies module: 17.3.6. HTTP::Cookies (Perl in a Nutshell)
- HTTP::Cookies::Netscape module: 17.3.6.1. HTTP::Cookies::Netscape (Perl in a Nutshell)
- HTTP::Daemon module: 17.3.7. HTTP::Daemon (Perl in a Nutshell)
- HTTP::Headers module: 17.3.3. HTTP::Headers (Perl in a Nutshell)
- HTTP::Request module: 17.3.1. HTTP::Request (Perl in a Nutshell)
- HTTP::Response module: 17.3.2. HTTP::Response (Perl in a Nutshell)
- IO::Socket module: 12.5. IO Objects and Filehandles (Advanced Perl Programming)
- LWP::RobotUA module: 17.2.1. LWP::RobotUA sections (Perl in a Nutshell)
- Mail modules
- Mail::Address module: Chapter 14, Reference: new (Perl in a Nutshell)
- Mail::Folder module: Chapter 14, Reference: new (Perl in a Nutshell)
- Mail::Internet module: Chapter 14, Reference: new (Perl in a Nutshell)
- Mail::Mailer module: Chapter 14, Reference: new (Perl in a Nutshell)
- Mail::POP3Client module: Chapter 14, Reference: new (Perl in a Nutshell)
- Mail::Send module: Chapter 14, Reference: new (Perl in a Nutshell)
- Net modules
- News::Newsrc module: Chapter 15, Reference: new (Perl in a Nutshell)
- URI::URL module: 17.5.2. URI::URL (Perl in a Nutshell)
- Win32 modules
- Win32::ChangeNotification module: 19.3. Win32::ChangeNotification (Perl in a Nutshell)
- Win32::Console module: 19.2. Win32::Console (Perl in a Nutshell)
- Win32::EventLog module: 19.4. Win32::Eventlog (Perl in a Nutshell)
- Win32::Internet module: 19.7. Win32::Internet (Perl in a Nutshell)
- 19.7.1. General Internet Methods (Perl in a Nutshell)
- Win32::Mutex module: 19.9. Win32::Mutex (Perl in a Nutshell)
- Win32::OLE module: Chapter 19, Reference: new (Perl in a Nutshell)
- Win32::OLE::Enum module: Chapter 19, Reference: new (Perl in a Nutshell)
- Win32::OLE::Variant module: 19.18.4. Win32::OLE::Variant (Perl in a Nutshell)
- Win32::Semaphore module: 19.14. Win32::Semaphore (Perl in a Nutshell)
- Win32::Shortcut module: 19.16. Win32::Shortcut (Perl in a Nutshell)
- new method: 17.2.1.1. Thread creation (Programming Perl)
- 29.2.100. new (Programming Perl)
used in a do while
- newnews() (Net::NNTP): Chapter 15, Reference: newnews (Perl in a Nutshell)
- news: 18.4. Reading and Posting Usenet News Messages (Perl Cookbook)
- newsgroups: 0.6.2. Usenet Newsgroups (Programming Perl)
- newsgroups() (Net::NNTP): Chapter 15, Reference: newsgroups (Perl in a Nutshell)
- .newsrc file: 15.3. The News::Newsrc Module (Perl in a Nutshell)
- new_tmpfile() (IO::File): 7.5. Creating Temporary Files (Perl Cookbook)
- newgroups() (Net::NNTP): Chapter 15, Reference: newgroups (Perl in a Nutshell)
- next, used in a do while: 4.5. Bare Blocks (Programming Perl)
- next command, do {} while construct, not taking: 24.1.3. C Traps (Programming Perl)
- next operator
- 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 (Perl in a Nutshell)
- 1.6.2.4. Breaking out: next and last (Programming Perl)
- 4.4.1. while and until Statements (Programming Perl)
- 4.4.4. Loop Control (Programming Perl)
- 4.4.4. Loop Control (Programming Perl)
- 29.2.101. next (Programming Perl)
- exiting once-through blocks with: 4.5. Bare Blocks (Programming Perl)
- next if construct: 24.2.1. Time Efficiency (Programming Perl)
- Next() (Win32::OLE::Enum): Chapter 19, Reference: Next (Perl in a Nutshell)
- next_labeled_message() (Mail::Folder): Chapter 14, Reference: next_labeled_message (Perl in a Nutshell)
- next_message() (Mail::Folder): Chapter 14, Reference: next_message (Perl in a Nutshell)
- NEXTKEY function: 9.3. Tying Hashes (Advanced Perl Programming)
- NFA (nondeterministic finite automata): 6.0. Introduction (Perl Cookbook)
- NFA (nondeterministic finite-state automaton): ?/ (Programming Perl) 5.9.4. The Little Engine That /Could(n't)
- $nlink file statistic: 29.2.165. stat (Programming Perl)
- NIC (Network Information Center): 5.1. Host Files (Perl for System Administration)
- NIS+: 5.2.1. NIS+ (Perl for System Administration)
- (see also NIS)
- NIS (Network Information Service)
- nlst() (Net::FTP): Chapter 16, Reference: nlst (Perl in a Nutshell)
- \NNN metasymbol: 5.3.2. Specific Characters (Programming Perl)
- no declarations: 4.7. Global Declarations (Programming Perl)
- 4.9. Pragmas (Programming Perl)
- 11.1. Using Modules (Programming Perl)
- 14.1.3. Magically Banishing $_ (Programming Perl)
- NNTP (Network News Transfer Protocol): 15. Usenet News (Perl in a Nutshell)
- nntppost() (Mail::Internet): Chapter 14, Reference: nntppost (Perl in a Nutshell)
- nntpstat() (Net::NNTP): Chapter 15, Reference: nntpstat (Perl in a Nutshell)
- no declaration: Chapter 5, Reference: no (Perl in a Nutshell)
- noecho input mode: 15.10. Reading Passwords (Perl Cookbook)
- NOFILE constant: 7.17. Caching Open Output Filehandles (Perl Cookbook)
- nomethod overloading key: (Programming Perl) 13.5. When an Overload Handler Is Missing (nomethod and fallback)
- non-blocking I/O: 7.14. Doing Non-Blocking I/O (Perl Cookbook)
- non-forking servers: 17.13. Non-Forking Servers (Perl Cookbook)
- non-greedy matching: 6.0. Introduction (Perl Cookbook)
- 6.15. Greedy and Non-Greedy Matches (Perl Cookbook)
- 4.6.6. Quantifiers (Perl in a Nutshell)
- nonbacktracking subpatterns: 5.10.2. Nonbacktracking Subpatterns (Programming Perl)
- nondeterministic finite automata (NFA): 6.0. Introduction (Perl Cookbook)
- nondeterministic finite-state automaton (NFA): ?/ (Programming Perl) 5.9.4. The Little Engine That /Could(n't)
- none index (Menu widget): 18.15.1. Menu Indexes (Perl in a Nutshell)
- nonforker program (example): 17.13. Non-Forking Servers (Perl Cookbook)
- noninteractive mode, putting debugger in: 20.4. Unattended Execution (Programming Perl)
- nonnblocking filehandles: 12.3.3. Nonblocking Filehandles (Advanced Perl Programming)
- NonStop option (PERLDB_OPTS): 6.4. Customizing the Debugger (Perl in a Nutshell)
- no_proxy() (LWP::UserAgent): Chapter 17, Reference: no_proxy (Perl in a Nutshell)
- not (!) operator: 3.5. Ideographic Unary Operators (Programming Perl)
- not equal to (!=) operator: 3.12. Equality Operators (Programming Perl)
- NOT functionality in regular expressions: 6.17. Expressing AND, OR, and NOT in a Single Pattern (Perl Cookbook)
- notational convenience, tied arrays: 14.2.2. Notational Convenience (Programming Perl)
- noTTY option (PERLDB_OPTS): 6.4. Customizing the Debugger (Perl in a Nutshell)
- nounder_demo program (example): 13.15. Creating Magic Variables with tie (Perl Cookbook)
- nouns: 1.2. Natural and Artificial Languages (Programming Perl)
- novice programmers, common mistakes of: 24.1. Common Goofs for Novices (Programming Perl)
- no_visits() (LWP::RobotUA): Chapter 17, Reference: no_visits (Perl in a Nutshell)
- nph() (CGI.pm): Chapter 10, Reference: nph (Perl in a Nutshell)
- $NR variable: 4.4.1. Global Special Variables (Perl in a Nutshell)
- nslookup program: 5.3.2.1. Using nslookup (Perl for System Administration)
- nstore(): 11.13. Storing Data Structures to Disk (Perl Cookbook)
- NTFS file permissions: 19.6. Win32::FileSecurity (Perl in a Nutshell)
- ntrights.exe (Windows NT/2000): 3.2.5. NT/2000 User Rights (Perl for System Administration)
- null
- null device, Unix: 14.4.2. Creative Filehandles (Programming Perl)
- null list, assigning to arrays: 2.8.2. Array Length (Programming Perl)
- null values ("" or 0): 1.2.1.1. Singularities (Programming Perl)
- NULLABLE attribute (DBI): 12.2.3. Database Handles and Statement Handles (Perl in a Nutshell)
- number width: 25.2. Endianness and Number Width (Programming Perl)
- numbered variables: 28.2. Special Variables in Alphabetical Order (Programming Perl)
- numeric context: 2.7.1. Scalar and List Context (Programming Perl)
- numeric literals: 2.6.1. Numeric Literals (Programming Perl)
- NUM_OF_FIELDS attribute (DBI): 12.2.3. Database Handles and Statement Handles (Perl in a Nutshell)
- NUM_OF_PARAMS attribute (DBI): 12.2.3. Database Handles and Statement Handles (Perl in a Nutshell)
- numbers: 1.4. Converting Between ASCII Characters and Values (Perl Cookbook)
- 2.0. Introduction (Perl Cookbook)
- 4.2.1. Numbers (Perl in a Nutshell)
- 1.2.1. Variable Syntax (Programming Perl)
- adding commas to: 2.17. Putting Commas in Numbers (Perl Cookbook)
- arrays, storing in: 1.2.1.2. Pluralities (Programming Perl)
- bitwise operators, working with: 3.13. Bitwise Operators (Programming Perl)
- command (see command history, debugger and)
- commas, inserting into: 7.1. Format Variables (Programming Perl)
- comparison operators for: 1.5.6. Some Numeric and String Comparison Operators (Programming Perl)
- complex (imaginary): 2.15. Using Complex Numbers (Perl Cookbook)
- converting binary with decimal: 2.4. Converting Between Binary and Decimal (Perl Cookbook)
- converting nonnumeric variables to: 13.3. Overloadable Operators (Programming Perl)
- converting with ASCII characters: 1.4. Converting Between ASCII Characters and Values (Perl Cookbook)
- \d (digit) character class
- 4.6.4. Character Classes (Perl in a Nutshell)
- d for digit=\d (for digit): 1.7. Regular Expressions (Programming Perl)
- \D (nondigit) character class: 4.6.4. Character Classes (Perl in a Nutshell)
- decimal places, controlling: 13.14. Overloading Operators (Perl Cookbook)
- digits in names: 2.5. Names (Programming Perl)
- fixed-precision numeric fields: 4.10. Formats (Perl in a Nutshell)
- floating-point (see floating-point numbers)
- 2.2. Comparing Floating-Point Numbers (Perl Cookbook)
- 2.3. Rounding Floating-Point Numbers (Perl Cookbook)
- for pages: 28.2. Special Variables in Alphabetical Order (Programming Perl)
- functions dealing with: 29.1. Perl Functions by Category (Programming Perl)
- functions for: 5.1. Perl Functions by Category (Perl in a Nutshell)
- hexadecimal: 2.6.1. Numeric Literals (Programming Perl)
- 29.2.73. hex (Programming Perl)
- hexadecimal, converting to: (Programming Perl) 5.2.3. The s/// Operator (Substitution)
- integers (see integers)
- justifying by decimal point: 7. Formats (Programming Perl)
- large, underscore and: 2.6.1. Numeric Literals (Programming Perl)
- line (__LINE__ token): 10.4. Determining Current Function Name (Perl Cookbook)
- 4.4.4. Global Special Constants (Perl in a Nutshell)
- logarithms: 2.13. Taking Logarithms (Perl Cookbook)
- matrix multiplication: 2.14. Multiplying Matrices (Perl Cookbook)
- octal: 2.6.1. Numeric Literals (Programming Perl)
- 29.2.103. oct (Programming Perl)
- plural words based on: 2.18. Printing Correct Plurals (Perl Cookbook)
- port, getting name for: 29.2.64. getservbyname (Programming Perl)
- ports, getting protocol names from: 29.2.65. getservbyport (Programming Perl)
- primes, calculating: 2.19. Program: Calculating Prime Factors (Perl Cookbook)
- protocol: 29.2.59. getprotobynumber (Programming Perl)
- random: 2.0. Introduction (Perl Cookbook)
- roman numerals: 2.6. Working with Roman Numerals (Perl Cookbook)
- strings as valid numbers: 2.1. Checking Whether a String Is a Valid Number (Perl Cookbook)
- strings, converting to: 2.6. Scalar Values (Programming Perl)
- trigonometry: 2.11. Doing Trigonometry in Degrees, not Radians (Perl Cookbook)
- truncating with int: 29.2.76. int (Programming Perl)
- truth values of: 1.6.1. What Is Truth? (Programming Perl)
- typing in Perl: 2.6. Scalar Values (Programming Perl)
- width of: 25.2. Endianness and Number Width (Programming Perl)
- NV (internal double value): 21.2. Internal Data Types (Programming Perl)
- NVs (doubles): 20.3.1. Scalar Values (Advanced Perl Programming)
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