C++ supports several built-in data types that are used to represent different kinds of values. Here are some of the most common data types in C++:
1. int: Integers are whole numbers without decimal points. In C++, the int data type is used to represent integer values. For example, `int x = 42;`.
2. double: Doubles are floating-point numbers with decimal points. In C++, the double data type is used to represent double-precision floating-point values. For example, `double y = 3.14;`.
3. char: Characters are single letters, digits, or symbols. In C++, the char data type is used to represent individual characters. For example, `char c = ‘a’;`.
4. bool: Booleans are values that can be either true or false. In C++, the bool data type is used to represent Boolean values. For example, `bool isFinished = false;`.
5. string: Strings are sequences of characters. In C++, the string data type is used to represent strings. For example, `string message = “Hello, world!”;`.
6. float: Floats are floating-point numbers with decimal points. In C++, the float data type is used to represent single-precision floating-point values. For example, `float z = 3.14f;`.
7. long: Long integers are similar to regular integers, but they can represent larger values. In C++, thelong data type is used to represent long integer values. For example, `long n = 1234567890;`.
8. short: Short integers are similar to regular integers, but they can represent smaller values than regular integers. In C++, the short data type is used to represent short integer values. For example, `short m = 42;`.
9. unsigned: Unsigned integers are integers that can only represent non-negative values. In C++, the unsigned keyword is used to create unsigned integer variables. For example, `unsigned int x = 10;`.
10. long long: Long long integers are similar to regular long integers, but they can represent even larger values. In C++, the long long data type is used to represent long long integer values. For example, `long long n = 123456789012345;`.
11. wchar_t: Wide characters are characters that can represent a wider range of characters than regular characters. In C++, the wchar_t data type is used to represent wide characters. For example, `wchar_t c = L’α’;`.
These data types are used to represent different kinds of values in C++, and choosing the right data type for a particular variable depends on the range and precision of values that it needs to represent.