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Parameter names can be specified for both optional and required parameters, and can be used to improve readability or arbitrarily reorder arguments in a call. For example: Stream OpenFile ( string name , FileMode mode = FileMode .
Without named parameters, optional parameters can only appear at the end of the parameter list, since there is no other way to determine which values have been omitted. In languages that support named optional parameters, however, programs may supply any subset of the available parameters, and the names are used to determine which values have ...
A new pseudo-type dynamic is introduced into the C# type system. It is treated as System.Object, but in addition, any member access (method call, field, property, or indexer access, or a delegate invocation) or application of an operator on a value of such type is permitted without any type checking, and its resolution is postponed until run-time.
^c In Fortran, function/subroutine parameters are called arguments (since PARAMETER is a language keyword); the CALL keyword is required for subroutines. ^d Instead of using "foo" , a string variable may be used instead containing the same value.
When discussing the code inside the subroutine definition, the variables in the subroutine's parameter list are the parameters, while the values of the parameters at runtime are the arguments. For example, in C, when dealing with threads it is common to pass in an argument of type void* and cast it to an expected type:
When no initial value seems appropriate, for example, when one wants to fold the function which computes the maximum of its two parameters over a non-empty list to get the maximum element of the list, there are variants of foldr and foldl which use the last and first element of the list respectively as the initial value.
An infobox for programming languages, scripting languages or computer programs directly related to software development that implement the aforementioned. Template parameters [Edit template data] This template prefers block formatting of parameters. Parameter Description Type Status Name name Name used if title not specified. This is also used internally in combination with Template:Latest ...
return value; } Ruby def foo«(parameters)» instructions end: def foo«(parameters)» instructions expression resulting in return value end or def foo«(parameters)» instructions return value end: Windows PowerShell Add-Member «-MemberType» ScriptMethod «-Name» foo «-Value» { «param(parameters)» instructions} -InputObject variable