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fruit = apples + oranges; // get the total fruit

no whitespace characters are necessary between fruit and =, or between = and apples,
although you are free to include some if you wish to increase readability.

Data types in C refer to an extensive system used for declaring variables or functions of
different types. The type of a variable determines how much space it occupies in storage and how
the bit pattern stored is interpreted.
The types in C can be classified as follows:

Types and Description
.N.

Basic Types:
They are arithmetic types and are further classified into: (a) integer types and
(b) floating-point types.

Enumerated types:
They are again arithmetic types and they are used to define variables that can
only assign certain discrete integer values throughout the program.

The type void:
The type specifier void indicates that no value is available.

Derived types:
They include (a) Pointer types, (b) Array types, (c) Structure types, (d) Union
types, and (e) Function types.

The array types and structure types are referred collectively as the aggregate types. The
type of a function specifies the type of the function's return value. We will see the basic types in
the following section, whereas other types will be covered in the upcoming chapters.

Integer Types
The following table provides the details of standard integer types with their storage sizes
and value ranges:

Type Storage Value range
size

char 1 byte -128 to 127 or 0 to 255