1.

Basic Types

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

2.

Enumerated Types

These are again arithmetic types and they are used to define variables that can only assign certain discrete integer values throughout the

program.

3.

The type void

The type specifier void indicates that no value is available.

4.

Derived types

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