How the file is handled in the Pascal?

The file is a sequence of components which are of uniform type. The type of components defines the type of file. The data type of the file is defining as:

type
File-name=file of base-type;

where base type reflects the type of components.

The base type can be anything from the list that includes real, integer, Boolean, enumerated, record, subrange and so on. The variables of file type are declared as:

var
f1, f2, f3....: file-name;