Mega Code Archive
Perls special variables
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VARIABLE DEFAULT VALUE DESCRIPTION
$_ N/A The default input and pattern-searching space.
$digit N/A Contains the subpattern from a successful parentheses pattern match.
$& N/A The string from the last successful pattern match.
$æ N/A The preceding string to the last successful pattern match.
$' N/A The string following the last successful pattern match.
$+ N/A The last bracket matched from the last search pattern.
$* 0 Controls internal string multiline pattern matching.
$. N/A The current input line number of last filehandle read.
$/ \n The input record separator.
$| 0 If set to nonzero, forces a flush of the currently selected stream after every write.
$, N/A The output field separator for the print command.
$" Space The separator that joins elements of arrays interpolated in strings.
$\ N/A The output record separator for the print command.
$; \034 The subscript separator for multidimensional array emulation.
$# N/A The output format for printed numbers.
$% N/A The page number of the currently selected output stream.
$= 60 The page length of the currently selected output stream.
$– N/A The number of lines left on the current page.
$˜ filehandle The name of the current top of page format for the currently selected output stream.
$: \n- The characters used to fill a continuation field.
$ËœL \f The default form-feed character.
$? N/A The status value returned from the last system, pipe close, or back tick command.
$! N/A Contains the current value of errno.
$@ N/A The Perl syntax error from the last eval statement.
$$ N/A The process ID (PID) of the current running Perl script.
$< N/A The real user ID (UID) of the current running process.
$> N/A The effective UID of the current running process.
$( N/A The real group ID (GID) of the current running process.
$) N/A The effective GID of the current running process.
$0 N/A The name of the file of the Perl script.
$[ 0 The index of the first element of an array.
$] N/A The string printed out when Perl is run with the -v command line option.
$ËœA N/A The accumulator for form line and write operations.
$ËœD N/A The current value of the debugging flags.
$ËœF 2 The maximum number of system file descriptors.
$ËœI N/A Contains the current value of the in-place editing flag (-i).
$ËœP N/A Internal debugging flag.
$ËœT N/A The time in which the script began running.
$ËœW N/A The current value of the warning switch.
$ËœX N/A The name of the Perl binary that was executed.
$ARGV N/A The name of the current file when reading from <>.
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