Summary
Base36 is a binary-to-text encoding scheme that represents binary data in an ASCII string format by translating it into a radix-36 representation. The choice of 36 is convenient in that the digits can be represented using the Arabic numerals 0–9 and the Latin letters A–Z[1] (the ISO basic Latin alphabet).
Each base36 digit needs less than 6 bits of information to be represented.
Conversion
editSigned 32- and 64-bit integers will only hold at most 6 or 13 base-36 digits, respectively (that many base-36 digits can overflow the 32- and 64-bit integers). For example, the 64-bit signed integer maximum value of "9223372036854775807" is "1Y2P0IJ32E8E7" in base-36. Similarly, the 32-bit signed integer maximum value of "2147483647" is "ZIK0ZJ" in base-36.
Standard implementations
editThe C standard library since C89 supports base36 numbers via the strtol and strtoul functions[2]
In the Common Lisp standard (ANSI INCITS 226-1994), functions like parse-integer support a radix of 2 to 36.[3]
Java SE supports conversion from/to String to different bases from 2 up to 36. For example, [1] and [2]
Just like Java, JavaScript also supports conversion from/to String to different bases from 2 up to 36. [3]
PHP, like Java, supports conversion from/to String to different bases from 2 up to 36 using the base_convert function, available since PHP 4.
Go supports conversion to string to different bases from 2 up to 36 using the built-in strconv.FormatInt(), and strconv.FormatUint() functions,[4][5] and conversions from string encoded in different bases from 2 up to 36 using the built-in strconv.ParseInt(), and strconv.ParseUint() functions.[6][7]
Python allows conversions of strings from base 2 to base 36.[8]
Raku supports base2 to base36 for all its real numeric types with its builtins: base[9] and parse-base.[10]
See also
edit- Senary – Base-6 numeral system
- Uuencoding
References
edit- ^ Hope, Paco; Walther, Ben (2008), Web Security Testing Cookbook, Sebastopol, CA: O'Reilly Media, Inc., ISBN 978-0-596-51483-9
- ^ "strtol, strtoll — cppreference.com".
- ^ "Common Lisp HyperSpec". LispWorks. Retrieved 3 August 2022.
- ^ "Strconv package - strconv - PKG.go.dev".
- ^ "Strconv package - strconv - PKG.go.dev".
- ^ "Strconv package - strconv - PKG.go.dev".
- ^ "Strconv package - strconv - PKG.go.dev".
- ^ "Built-in Functions — Python 3.10.0 documentation".
- ^ "base".
- ^ "routine parse-base".
External links
edit- A discussion about the proper name for base 36 at the Wordwizard Clubhouse
- The Prime Lexicon, a list of words that are prime numbers in base 36
- A Binary-Octal-Decimal-Hexadecimal-Base36 converter written in PHP
- A C# base 36 encoder and decoder
- sample in C# that demonstrates the HexaTriDecimal Numbering System including string parsing, as well as increment/decrement operations