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Functions in Ada
Based on the provided input, here’s the translation of the Go code to Ada, formatted in Markdown suitable for Hugo:
Functions are central in Ada. We’ll learn about functions with a few different examples.
with Ada.Text_IO; use Ada.Text_IO;
procedure Functions is
-- Here's a function that takes two Integers and returns
-- their sum as an Integer.
function Plus (A : Integer; B : Integer) return Integer is
begin
-- Ada doesn't require explicit returns, but it's good practice
-- to include them for clarity.
return A + B;
end Plus;
-- In Ada, you need to declare the types for each parameter separately,
-- even if they are of the same type.
function Plus_Plus (A : Integer; B : Integer; C : Integer) return Integer is
begin
return A + B + C;
end Plus_Plus;
Res : Integer;
begin
-- Call a function just as you'd expect, with
-- name(args).
Res := Plus(1, 2);
Put_Line("1+2 =" & Integer'Image(Res));
Res := Plus_Plus(1, 2, 3);
Put_Line("1+2+3 =" & Integer'Image(Res));
end Functions;To run the program:
$ gnatmake functions.adb
$ ./functions
1+2 = 3
1+2+3 = 6There are several other features to Ada functions. One is out parameters, which we’ll look at next.