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Perl Language Reference Manual
by Larry Wall and others
Paperback (6"x9"), 724 pages
ISBN 9781906966027
RRP £29.95 ($39.95)

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hex EXPR


Interprets EXPR as a hex string and returns the corresponding value. (To convert strings that might start with either 0, 0x, or 0b, see .) If EXPR is omitted, uses $_.

print hex '0xAf'; # prints '175'
print hex 'aF';   # same

Hex strings may only represent integers. Strings that would cause integer overflow trigger a warning. Leading whitespace is not stripped, unlike oct(). To present something as hex, look into , , or .

ISBN 9781906966027Perl Language Reference ManualSee the print edition