Other Perl Globals
Table B.3 lists other Perl globals used in the body of this book. The first column is the Perl punctuation variable, and the second is its English-language equivalent when the English module is loaded.
| Variable | English | Description |
|---|---|---|
| $? | $CHILD_ERROR | Status returned by the last pipe close, backtick, or successful call to wait(); a status of 0 generally indicates that the child terminated without error |
| $! | $ERRNO | Error message from the last failed system call |
| $^E | $EXTENDED_OS_ERROR | Extended error information from non-UNIX operating systems |
| $<digit> | Last matched subexpression from a successful pattern match (e.g., $1, $2) | |
| $& | $MATCH | Entire string matched by the last successful pattern match |
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