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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, © Structure types, (d) Union types and (e) Function types.