Fixed width integer types (since C99) (2024)

FAQs

What are fixed width integer types? ›

Fixed-width integers are integral types with a fixed number of bits. The C++ standard only specifies a minimum byte count for types such as short , int and long . Fixed-width integers guarantee a specific size, but their use can have an impact on portability, since they are not supported by all platforms.

C99 provides a stdint. h header file that defines integer types with known size independent of the machine architecture. So in C99, you can use int8_t instead of signed char to guarantee a signed type that holds exactly 8 bits, or uint64_t instead of unsigned long long to get a 64-bit unsigned integer type.

The width, precision, or bitness of an integral type is the number of bits in its representation. An integral type with n bits can encode 2ⁿ numbers; for example an unsigned type typically represents the non-negative values 0 through 2ⁿ−1.

The int16_t data type is guaranteed to be 16 bits wide, no matter what compiler implementation you are using. The width of the int data type, as well as other built-in integral data types, can and does vary from one compiler implementation to another. In other words, the size of an int is implementation-defined.

Integers: These are of four types: byte , short , int , long . It is important to note that these are signed positive and negative values. Signed integers are stored in a computer using 2's complement.

Integer data types are used to store a whole number without decimals, like 35, -50, or 1345000. The integer data type has two categories: Signed integers - can store both positive and negative values. Unsigned integers - can only store non-negative values.

An integer (pronounced IN-tuh-jer) is a whole number (not a fractional number) that can be positive, negative, or zero. Examples of integers are: -5, 1, 5, 8, 97, and 3,043.

Data in a fixed-width text file is arranged in rows and columns, with one entry per row. Each column has a fixed width, specified in characters, which determines the maximum amount of data it can contain. No delimiters are used to separate the fields in the file.

The int data type is used to represent integers. For example, to create an int variable to hold a value 5, we write the following: The num variable is now an int with a value of five. Here, we have created five variables, all of the int type, and initialized to zero.

How large is an int? ›

In C and C++, int has at least 16 bits. Usually, on common 32-bit and 64-bit architectures, it has 32 bits. The language standards permit it to have any size greater or equal to 16 bits. On the other hand, int32_t has exactly 32 bits.

In Ada, an integer type is not specified in terms of its machine representation, but rather by its range. The compiler will then choose the most appropriate representation. Another point to note in the above example is the My_Int'Image (I) expression.

For instance, Python has several built-in data types, including numeric types (int, float, complex), string (str), boolean (bool), and collection types (list, tuple, dict, set).

Concerning the representation of integers in computer programming, there are two main methods for the representation. The first method is signed integers, and the second method is unsigned integers. A signed integer is a 32-bit datum that can hold positive and negative numbers, including a zero.

Nim has these integer types built-in: int int8 int16 int32 int64 uint uint8 uint16 uint32 uint64. Most often integers are used for counting objects that reside in memory, so int has the same size as a pointer.