Field Definition

A field is a piece of information or an attribute of the record, which usually refers to part of the database table. It separates certain information about that database. A field is one of the essential elements or building blocks of a database used in organizing, storing, searching, and transmitting information.

Field In all software applications, be it a web form or any other, the field means any area in the user interface that holds any input. One would capture exhaustive data from users in a form field, from simple searches to very complex registration and checkouts.

In OOP, a variable declared under a class is called a field.

These fields will be used in storing data encapsulated within objects for a given class, which defines the state of an object. For example, in a class modeling a book, the different types of information to be handled include title, author, or even ISBN. If this has to be declared as public or protected, it depends on how far the access to this data is by other parts of the application.