Course of Raku / Essentials / More about functions

Return type

The result of the function can also be explicitly made typed. There are a few ways to express that in code.

sub add(Int $x, Int $y) returns Int { $x + $y }

my Int sub add(Int $x, Int $y) { $x + $y }

sub add(Int $x, Int $y) of Int { $x + $y }

sub add(Int $x, Int $y --> Int) { $x + $y }

Choose one that you like the most. Notice that in the fourth example, the return type is written inside of the parentheses with function parameters.

Practice

Complete the quiz that covers the contents of this topic.

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