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Diffstat (limited to 'pod/perldata.pod')
| -rw-r--r-- | pod/perldata.pod | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/pod/perldata.pod b/pod/perldata.pod index 315f716ed8..48cd0e7cf5 100644 --- a/pod/perldata.pod +++ b/pod/perldata.pod @@ -271,11 +271,23 @@ integer formats: 12345 12345.67 .23E-10 # a very small number - 4_294_967_296 # underline for legibility + 4_294_967_296 # underscore for legibility 0xff # hex 0377 # octal 0b011011 # binary +You are allowed to use an underscore in numeric literals for legibility, +but in decimal numeric literals (those written in base 10, not +necessarily with a fractional part), digits may only be grouped in +threes. For decimal numeric literals containing a fractional part, +this applies only to the part before the decimal point; the fractional +part (but not the exponent, if given!) may contain underscores +anywhere you feel it enhances legibility. Binary, octal, and +hexadecimal numeric literals may contain underscores in any place -- +so you could, for example, group binary digits by threes (as for a +Unix-style mode argument such as 0b110_100_100) or by fours (to +represent nibbles, as in 0b1010_0110) or in other groups. + String literals are usually delimited by either single or double quotes. They work much like quotes in the standard Unix shells: double-quoted string literals are subject to backslash and variable |