Editing Default (computer science) (section)

==In computer languages==
{{anchor|Default parameter}}Many languages in the [[C (programming language)|C]] family (but not C itself, as of [[C11 (C standard revision)|C11]]) allow a function to have ''default'' parameters or [[default argument]]s, that are used if the function is called with omitted parameter specifications.

In C and programming languages based on its syntax, the <code>switch</code> statement (which dispatches among a number of alternatives) can make use of the <code>default</code> keyword to provide a case for when no other case matches.

In [[Fortran]], the INIT parameter on a declaration defines an initial default value for that variable.

In [[Rust (programming language)|Rust]], [[Data type|types]] that implement the <code>Default</code> [[Trait_(computer_programming)#Rust|trait]] can produce a default [[Value (computer science)|value]].<ref>{{cite web |title=Default in std::default - Rust |url=https://doc.rust-lang.org/std/default/trait.Default.html |website=The Rust Standard Library |access-date=10 April 2022}}</ref> For example, the [[Primitive data type|primitive]] integer types in Rust implement the <code>Default</code> trait by returning 0.