# Integer Sidef supports arbitarily large integers, by using [Math::GMPz](https://metacpan.org/pod/Math::GMPz), which is the Perl interface to the [GMP](https://gmplib.org/) library. ```ruby 255 # decimal 0xff # hexadecimal 0377 # octal 0b1111_1111 # binary ``` A numerical string (in any base from 2 to 62) can be converted into a number as following: ```ruby Number("1234") # from string in base 10 (default) Number("foo", 36) # from string in base 36 ``` The `Number.base(b)` method provides conversion from numbers into strings in a given base: ```ruby 1234.base(13) # to string in base 13 1234.base(36) # to string in base 36 ``` --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://trizen.gitbook.io/sidef-lang/syntax_and_semantics/literals/integer.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.