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C++ provides a robust std::string class in the <string> library, which includes numerous functions for string manipulation. Below is a detailed overview of commonly used string functions and their applications, along with examples.
Commonly Used String Functions
1. Length of a String
Function: length() or size()
Use: Returns the number of characters in the string.
Example:
std::string text = "Hello, World!";int len = text.length(); // or text.size();std::cout << "Length: " << len << std::endl; // Output: 13Cóipeáilte!✕Cóipeáil2. Accessing Characters
Function: at(index) or []
Use: Accesses a character at a specific index.
Example:
std::string str = "C++";char ch = str.at(1); // or str[1];std::cout << "Character: " << ch << std::endl; // Output: +Cóipeáilte!✕Cóipeáil3. Concatenating Strings
Function: + operator or append()
Use: Combines two strings.
Example:
C++ string Library Reference (string functions) - W3Schools
The <string> library has many functions that allow you to perform tasks on strings. A list of all string functions can be found in the table below. Learn more about strings in our C++ Strings Tutorial.
Returning a C string from a function - Stack Overflow
In C++ use 'helper classes' (for example, std::string) to handle the longevity of data (which requires changing the function's return value), or pass a buffer to the function that gets filled in with information.
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string - C++ Users
Learn how to use the string class to represent and manipulate sequences of characters in C++. The web page provides the definition, member types, member functions, and non-member function overloads …
C++ Strings (With Examples) - Programiz
In this tutorial, you'll learn to handle strings in C++. You'll learn to declare them, initialize them and use them for various input/output operations.
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String Functions In C++: getline, substring, string length …
1 Aib 2025 · In this Tutorial, we will Discuss some of the Popular String Functions in C++ such as getline substring, string length, string find, split string etc.
String Functions in C++
22 MFómh 2024 · The standard library’s <string> header provides many useful string-related functions. Here are some examples to give you a sense of the available functionality.
C++ String Functions - CodeToFun
3 MFómh 2024 · This reference guide provides an overview of essential C++ string functions. By incorporating these functions into your code, you can efficiently manipulate and analyze strings in various ways.
C++ String Function: strcpy(), strcat(), strlen(), strcmp() …
21 Samh 2024 · Deep dive into C++ string functions and operations. Learn strcpy (), strcat (), strlen (), strcmp () functions with example
Strings in C++ - GeeksforGeeks
20 MFómh 2025 · Strings in C++ are objects of the std::string class. They are used to represent and manipulate sequences of characters. Unlike C-style character arrays (char []), std::string handles memory management automatically and provides a wide range of built-in functions for ease of use.