Overview - Chapter: 0:History, 1:Design, 2:Basics, 3:Var, 4:Op, 5:IO, 6:{}, 7:Sub, 8:OOP, 9:Rx - Appendices: A:Index, B:Tables, C:Cook, D:Delta, E:Best of, F:Links

Number Literals

Konverting into numerical context means still: take from left to right all digits and other characters, up to the first char that clearly don't belong to a number definition and stop there.

A single underscore is allowed only between any two digits in a literal number, like:

$people = 3_456_789; # same as 3456789

Radix Prefixes

0b binary - base 2, digits 0..1
0o ocatal - base 8, digits 0..7
0d decimal - base 10, digits 0..9
0x hexadecimal - base 16, digits 0..9,a..f (case insensitive)

General Radix Form

:10<42> # same as 0d42 or 42

Scientific Notation

$float = 60.2e23 # becomes automatically 6.02e24
$float = 6.02E-23 # capital E works too

Rational Number

Complex Number

-3-6.02E-23i

Quoting

Q /.../;

Quote Words

qw/.../
<...>
Q :w /.../;
Q :words /.../;

<<>>
Q :ww /.../;
Q :quotewords /.../;

Single Quotes

''
Q :q /.../;
Q :double /.../;

Double Quotes

""
Q :q /.../;
Q :double /.../;
Q :s, :a, :h, :f, :c, :b /.../;

Heredocs

Q :to 'EOT'
...
...
EOT

Formating

perl

The .perl method is a built in Data::Dumper (pretty printer) which gives you structured data the way you write it in perl source code.

fmt

sprintf

pack

Formats

Command Line

Files

Sockets

Overview - Chapter: 0:History, 1:Design, 2:Basics, 3:Var, 4:Op, 5:IO, 6:{}, 7:Sub, 8:OOP, 9:Rx - Appendices: A:Index, B:Tables, C:Cook, D:Delta, E:Best of, F:Links