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Call a function: Difference between revisions
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* Ada provides for functions with optional parameters:<lang Ada>function F(X: Integer; Y: Integer := 0) return Integer;
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A : Integer := F(12);
B : Integer := F(12, 0); -- the same as A
C : Integer := F(12, 1); -- something different</lang>
* The caller is free to use either a positional parameters or named parameters, or a mixture of both (with positional parameters first) <lang Ada>
* Ada does not allow a variable number of arguments. But a function argument can be an unconstrained array with as many arguments as you want:<lang Ada>type Integer_Array is array (Positive range <>) of Integer;
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X := H(A, F'Access) -- assuming X and A are Integers, and F is a function
-- taking two Integers and returning an Integer.</lang>
=={{header|Icon}} and {{header|Unicon}}==
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