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Forms are generally used to retrieve data from user input such as text, selected radio buttons, selected checkboxes and actions like pushing a button

A form usually contains labels which describe it's various input fields.

The layout of a form is just as important as what it contains. Users must be able to work out which input is required and which input is optional.

Validation of the input must be carried out prior to the data being submitted to the application so that the user can change their input. (See , )

Form also refers to physical questionnaires on paper in which to fill in data by writing or printing.

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