Course of Raku / Advanced / Subroutines / Anonymous subroutines / Exercises
Triple it
Problem
An anonymous subroutine is a closure: it remembers the variables in
scope where it was written. Declare a variable $factor set
to 3. Then store a pointy block in $scale that
multiplies its argument by $factor (not by a hard-coded
3). Call $scale(7) and print the result.
Example
The program prints:
21