C++ Built-in functions are the ready-made library functions. These are the part of the c++ programming language. C++ offers a large number of built-in library functions to solve programming problems faster and easier.
There are many libraries in c++ with have different sets of functions like iostream, cmath, ctime, etc. We don’t need to declare and define built-in functions. We directly use them anywhere in our code.
Here is the list of libraries that provide a variety of functions to perform different tasks in c++.
| iostream | Provide functions for general input and output |
| cmath | This function library is used to solve mathematical problems |
| ctime | This library provides a list of functions to deal with date and time |
| cstdlib | Functions for the general purpose |
| cstring | Provide functions to deal with strings |
| cctype | Provide functions to classify and transform individual characters. |
| cfenv | Functions dealing with the floating-point environment |
| csignal | Provide functions to deal with signals |
| csetjmp | Functions to manipulate call and return sequences |
| cuchar | This function set provides support to 16-bit and 32-bit characters. |
| clocale | Set of functions used to handle different localization routines. |
| cwctype | This library provides a list of functions to classify and transform individual-wide characters. |
| cstdio | Provide functions to deal with input and output |
| cwchar | Provide functions to deal with wide strings. |