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String functions are used in computer programming languages to manipulate a string or query information about a string (some do both).. Most programming languages that have a string datatype will have some string functions although there may be other low-level ways within each language to handle strings directly.
Some compilers (for example, GCC [8]) provide built-in versions of many of the functions in the C standard library; that is, the implementations of the functions are written into the compiled object file, and the program calls the built-in versions instead of the functions in the C library shared object file.
A string is defined as a contiguous sequence of code units terminated by the first zero code unit (often called the NUL code unit). [1] This means a string cannot contain the zero code unit, as the first one seen marks the end of the string. The length of a string is the number of code units before the zero code unit. [1]
The C++ Standard Library provides several generic containers, functions to use and manipulate these containers, function objects, generic strings and streams (including interactive and file I/O), support for some language features, and functions for common tasks such as finding the square root of a number.
The std::string class is the standard representation for a text string since C++98. The class provides some typical string operations like comparison, concatenation, find and replace, and a function for obtaining substrings. An std::string can be constructed from a C-style string, and a C-style string can also be obtained from one. [7]
When a string appears literally in source code, it is known as a string literal or an anonymous string. [ 1 ] In formal languages , which are used in mathematical logic and theoretical computer science , a string is a finite sequence of symbols that are chosen from a set called an alphabet .
In computer software, in compiler theory, an intrinsic function, also called built-in function or builtin function, is a function available for use in a given programming language whose implementation is handled specially by the compiler.
Wikipedia does not have the "StringFunctions" series of parser functions (listed below), and is not going to get them (per phab:T8455). Instead, templates use Lua (via Module:String or otherwise), alongside existing parser functions. None of these functions will work, but they have alternatives: #len – use {{#invoke:string|len}}