Perl 5 version 8.3 documentation


  • hex EXPR
  • hex

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

    1. print hex '0xAf'; # prints '175'
    2. 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().