What is the use default value of the properties in acess

You add a default value to a table field or form control whenever you want Access to enter a value in a new record automatically. For example, you can have Access always add the current date to new orders.

Typically, you add a default value to your table fields. You add the value by opening the table in Design view and then entering a value in the Default Value property for the field. If you set a default value for a table field, Access applies your value to any controls that you base on that field. If you don't bind a control to a table field, or you link to data in other tables, you set a default value for your form controls itself.

You can set a default value for table fields set to the Text, Memo, Number, Date/Time, Currency, Yes/No, and Hyperlink data types. If you don't supply a value, the field remains null (blank) until you enter a value. After you define a default value, Access applies that value to any new records that you add. If you want, you can change the value in a record from the default value to another value, unless a validation rule prohibits this