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Index: Symbols & Numbers

• -- autodecrement operator: Autoincrement and Autodecrement
• ` ` backquotes/backticks: Whirlwind Tour of Perl
• • Using Backquotes to Capture Output
• { } curly braces (see curly braces)
• - hyphen: Input from the Diamond Operator
• • Character Classes
• ( ) parentheses (see parentheses)
• ' ' single quotes: Single-Quoted String Literals
• [ ] square brackets: Pattern Test Program
• • Character Classes
• - subtraction operator: Numeric Operators
• + addition operator: Numeric Operators
• .= append operator: Binary Assignment Operators
• @_ array variable: Arguments
• = assignment operator: Scalar Assignment
• @ at-sign: List Assignment
• ++ autoincrement operator: Autoincrement and Autodecrement
• \\\\ backslash: Single-Quoted String Literals
• • Backreferences
• =~ binding operator: The Binding Operator, =~
• ^ caret anchor: Anchors
• , comma: The Big Arrow
• $_ default variable (see default variable)
• / division operator: Numeric Operators
• $ dollar sign (see dollar sign)
• . dot (see dot)
• ./ dot and slash: Simple Program
• .. dot-dot: Links and Files
• -e command-line option: In-place Editing from the Command Line
• -eval option, find2perl command and: Converting find Command Lines to Perl
• ** exponentiation operator: Numeric Operators
• _ _FILE_ _ and _ _LINE_ _ tokens: Fatal Errors with die
• _ filehandle: Using the Special Underscore Filehandle
• -> little arrow: The Big Arrow
• • The File::Spec Module
• -i.bak command-line option: In-place Editing from the Command Line
• #! line: What's Inside That Program?
• • Whirlwind Tour of Perl
• % modulus operator: Numeric Operators
• • Picking Items from a List with grep
• * multiplication operator: Numeric Operators
• -n command-line option: In-place Editing from the Command Line
• ! negation operator (see negation operator)
• . operator: String Operators
• -p command-line option: In-place Editing from the Command Line
• % percent sign (see percent sign)
• | pipe: What Is a Filehandle?
• • Processes as Filehandles
• + plus sign: Simple Quantifiers
• # pound sign: What's Inside That Program?
• ? question mark: Simple Quantifiers
• **= raise to the power of operator: Binary Assignment Operators
• .. range operator: List Literals
• ; semicolon (see semicolon)
• * star: Simple Quantifiers
• . string concatenate operator: Binary Assignment Operators
• ?\: ternary operator: The Ternary Operator, ?:
• ~ tilde: Variable-length (Text) Databases
• ~ tilde-prefix: Moving Around the Directory Tree
• _ underscore: Integer Literals
• • The use strict Pragma
• $! variable: Fatal Errors with die
• \\| vertical bar: Alternatives
• -w option: Perl's Built-in Warnings
• • In-place Editing from the Command Line
  • vs. warnings pragma: The warnings Pragma
• & ampersand: Invoking a Subroutine
• • Omitting the Ampersand
• $& variable: The Automatic Match Variables
• && operator: Logical Operators
• • Control Structures Using Partial-Evaluation Operators
• &max subroutine: Arguments
• • Better &max Routine
• @ARGV array: The Invocation Arguments
• $ARGV variable: Input from the Diamond Operator
• $atime (timestamp): The stat and lstat Functions
• • changing: Changing Timestamps
• \\\\B nonword-boundary anchor: Word Anchors
• \\\\b word-boundary anchor: Word Anchors
• $ctime (timestamp): The stat and lstat Functions
• • changing: Changing Timestamps
• %d conversion: Formatted Output with printf
• \\\\d shortcut: Character Class Shortcuts
• $dev (device number): The stat and lstat Functions
• \\\\E shortcut: Case Shifting
• __END__ marker: The last Operator
• %ENV hash: The Environment Variables
• %f conversion: Formatted Output with printf
• %g conversion: Formatted Output with printf
• /g modifier, s/// substitution operator and: Global Replacements with /g
• $gid (see group-ID)
• => big arrow: The Big Arrow
• • Unquoted Hash Keys
• > greater-than sign: Opening a Filehandle
• `Hello, world' program: Simple Program
• /i modifier: Case-insensitive Matching with /i
• • s/// substitution operator and: Option Modifiers
• $^I variable: Variable-length (Text) Databases
• $ino (inode number): The stat and lstat Functions
• \\\\l shortcut: Case Shifting
• @lines array variable: Whirlwind Tour of Perl
• < less-than sign: Opening a Filehandle
• /m option: Matching Multiple-line Text
• $mode: The stat and lstat Functions
• $mtime (timestamp): The stat and lstat Functions
• • changing: Changing Timestamps
• \\\\n shortcut: What's Inside That Program?
• • within a single-quoted string: Single-Quoted String Literals
• .new files, renaming from .old files: Renaming Files
• $nlink (number of links): The stat and lstat Functions
• $now variable: Using Backquotes to Capture Output
• .old files, renaming to .new files: Renaming Files
• .plx file extension: Simple Program
• .pm files: What Are Regular Expressions?
• $" variable: Interpolating Arrays into Strings
• "money numbers" (see decimals)
• "" double quotes (see double quotes)
• "short-circuit" logical operators: Logical Operators
• %s conversion: Formatted Output with printf
• /s modifier: Matching Any Character with /s
• • s/// substitution operator and: Option Modifiers
• \\\\s shortcut: Character Class Shortcuts
• $size: The stat and lstat Functions
• \\\\u shortcut: Case Shifting
• $uid (see user-ID, numeric)
• /usr/bin/perl: What's Inside That Program?
• /usr/local/bin/perl: What's Inside That Program?
• \\\\w characters: Word Anchors
• \\\\w shortcut: Character Class Shortcuts
• `wimla,' diamond operator and: Input from the Diamond Operator
• Ú Ú forward slashes: Using Simple Patterns
• • Matches with m//