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Multiple Return Values in Wolfram Language
Wolfram Language has built-in support for multiple return values through the use of lists. This feature is often used to return both results and additional information from a function.
```wolfram
(* The List{_,_} in this function signature shows that
the function returns a list of 2 integers. *)
vals[] := {3, 7}
(* In the main function, we demonstrate how to use
the multiple return values *)
main[] := Module[{a, b, c},
(* Here we use pattern matching to assign the two
different return values from the call *)
{a, b} = vals[];
Print[a];
Print[b];
(* If you only want a subset of the returned values,
use a blank pattern (_) *)
{_, c} = vals[];
Print[c]
]
(* Execute the main function *)
main[]When you run this code, you’ll see the following output:
3
7
7In Wolfram Language, functions that return multiple values typically return them as elements of a list. We can use pattern matching to easily extract these values into separate variables.
The blank pattern _ in Wolfram Language serves a similar purpose to the blank identifier _ in some other languages, allowing us to ignore certain return values if we don’t need them.
Wolfram Language also supports functions with variable numbers of arguments, which we’ll explore in a future example.