bydefault

By default refers to the option, value, or behavior selected automatically by a system when no explicit instruction is provided. It denotes the standard or recommended setting that is assumed in the absence of user input, configuration changes, or other overrides.

In computing, defaults are defined by software, hardware, or protocols to ensure predictable operation. Default values may apply to file locations, languages, permissions, and parameters. If a user does not specify a value, the system uses the default. Developers often document defaults and provide ways to change them.

Networking and databases frequently rely on defaults such as a default route (gateway) for packet forwarding, and default column values or constraints for records with missing data.

In law and policy, "by default" indicates a consequence or status that applies unless a contrary action is taken. For example, a contract may take effect by default if no counterparty objection is raised.

Advantages of sensible defaults include ease of use, safety in new or complex systems, and faster setup. Drawbacks include the risk of privacy, security, or interoperability issues if defaults are not appropriate for all users, or if users rarely change them.

Best practices involve choosing defaults that align with common user needs, documenting them clearly, and providing accessible ways to override defaults. See also: default value, default constructor, default gateway, default settings.