Programming Ruby 3.3

Numbers

Ruby supports integers, floating-point, rational, and complex numbers. Integers can be of any length (up to a maximum determined by the amount of free memory on your system) and are of type Integer.

Integers are assumed to be decimal base 10, but, you can write integers using a leading sign as an optional base indicator—0 for octal, 0x for hex, or 0b for binary (and 0d for decimal)—followed by a string of digits in the appropriate base.

Underscore characters are ignored in the digit string, you’ll see them used in place of commas in larger numbers.

123456                   => 123456   # base 10
0d123456                 => 123456   # base 10
123_456                  => 123456   # underscore ignored
-543                     => -543     # negative number
0xaabb                   => 43707    # hexadecimal
0377 => 255  ...