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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]
In C and C++, keywords and standard library identifiers are mostly lowercase. In the C standard library, abbreviated names are the most common (e.g. isalnum for a function testing whether a character is alphanumeric), while the C++ standard library often uses an underscore as a word separator (e.g. out_of_range).
C string handling — overview of C string handling; C++ string handling — overview of C++ string handling; Comparison of programming languages (string functions) Connection string — passed to a driver to initiate a connection (e.g., to a database) Empty string — its properties and representation in programming languages
C++, Boost [10] C, for some type names in the standard library, but not for function names. Eiffel, for class and feature names [11] Elixir, for atom, variable, and function names [12] Erlang, for function names [13] GDScript, for variable and function names [14] Java uses SCREAMING_SNAKE_CASE for static final constants and enum values. [15]
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]
For function that manipulate strings, modern object-oriented languages, like C# and Java have immutable strings and return a copy (in newly allocated dynamic memory), while others, like C manipulate the original string unless the programmer copies data to a new string.
The Compaq C++ compiler on OpenVMS VAX and Alpha (but not IA-64) and Tru64 UNIX has two name mangling schemes. The original, pre-standard scheme is known as the ARM model, and is based on the name mangling described in the C++ Annotated Reference Manual (ARM).
The \n escape sequence allows for shorter code by specifying the newline in the string literal, and for faster runtime by eliminating the text formatting operation. Also, the compiler can map the escape sequence to a character encoding system other than ASCII and thus make the code more portable.