Of the same size as char, but guaranteed to be unsigned. Capable of containing at least the range. Of the same size as char, but guaranteed to be signed.

Actual type can be either signed or unsigned. Smallest addressable unit of the machine that can contain basic character set. The following table lists the permissible combinations in specifying a large set of storage size-specific declarations. The C language provides the four basic arithmetic type specifiers char, int, float and double, and the modifiers signed, unsigned, short, and long. Headers for the C standard library, to be used via include directives, contain definitions of support types, that have additional properties, such as providing storage with an exact size, independent of the language implementation on specific hardware platforms.

The C language provides basic arithmetic types, such as integer and real number types, and syntax to build array and compound types. Data types also determine the types of operations or methods of processing of data elements. They are expressed in the language syntax in form of declarations for memory locations or variables.

In the C programming language, data types constitute the semantics and characteristics of storage of data elements.

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