Common data types in C++

C++ supports several different data types. Here are some of the most common ones:

1. Integer types (int): These are used to store whole numbers. The size of an int is usually 4 bytes (32 bits), and it can store numbers from -2,147,483,648 to 2,147,483,647.
2. Floating-point types (float, double): These are used to store real numbers (numbers with fractional parts). A float typically occupies 4 bytes of memory, while a double occupies 8 bytes.
3. Character types (char): These are used to store individual characters. A char occupies 1 byte of memory and can store any character in the ASCII table.
4. Boolean type (bool): This type is used to store either true or false.
5. String type (std::string): This is used to store sequences of characters, or strings. It’s not a built-in type, but is included in the C++ Standard Library.
6. Array types: These are used to store multiple values of the same type in a single variable.
7. Pointer types: These are used to store memory addresses.
8. User-defined types (classes, structs, unions, enums): These allow users to define their own data types.

Each of these types has its own characteristics and uses, and understanding them is fundamental to programming in C++.