Course of Raku / Essentials / Functions essentials / Creating and calling functions / Exercises / Interval function

Solution: Interval function

In this function, a three-branch if construct is used. The first two branches have a Boolean test, but the third check is not needed as it is the only remaining option if the number did not pass either of the first two tests.

Code

Here is the solution:

sub f($x) {
    if    $x > 0  { return $x - 0.5 }
    elsif $x == 0 { return 0 }
    else          { return -$x }
}

say f(-2);
say f(0);
say f(3);

🦋 Find the program in the file interval-function.raku.

Output

$ raku exercises/functions/interval-function.raku
2
0
2.5

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