The printed representation of an integer consists of a sequence of digits, optionally prefixed by a sign and arbitrarily separated by commas or underscores.

Integers are entered in base 10 unless prefixed with a base-changing prefix. 0x begins a hexadecimal literal, 0o an octal literal, and 0b a binary literal. A sign, if any, goes before the base prefix.

More information on integers can be found in Integers.