Sudan function: Difference between revisions

=={{header|Swift}}

{{trans|C}}

I have started working on Swift and am going to practice on RosettaCode. On converting my C implementation to Swift which I contributed last year I found Swift allows statement ending semicolons and enclosing parantheses in if/else statements. I didn't find that anywhere while learning Swift so I am posting both implementations here, the "C like" and the "Pure" Swift.

Both have been tested with Xcode 14.2 (14C18)

===C like===

<lang swift>

//Aamrun, 3rd February 2023

func F(n: Int,x: Int,y: Int) -> Int {

if (n == 0) {

return x + y;

}

else if (y == 0) {

return x;

}

return F(n: n - 1, x: F(n: n, x: x, y: y - 1), y: F(n: n, x: x, y: y - 1) + y);

}

print("F1(3,3) = " + String(F(n: 1,x: 3,y: 3)));

</lang>

===Pure Swift===

<lang swift>

//Aamrun, 3rd February 2023

func F(n: Int,x: Int,y: Int) -> Int {

if n == 0 {

return x + y

}

else if y == 0 {

return x

}

return F(n: n - 1, x: F(n: n, x: x, y: y - 1), y: F(n: n, x: x, y: y - 1) + y)

}

print("F1(3,3) = " + String(F(n: 1,x: 3,y: 3)))

</lang>

Output is the same for both

{{out}}

<pre>

F1(3,3) = 35

</pre>