Currying is when you take one function and make a new function by giving defaults to the first one. Here is an example in Perl 6 (please correct me if i got it wrong).

sub add(Num $x, Num $y){ $x + $y }
&add_two := &add.assuming(y => 2);
say add_two(1); # prints 3
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Currying is in S06 and S03.