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.


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More about functions / Typed parameters   |   More about functions / Multi-functions

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