Documentation for routine chop assembled from the following types:

class Cool

From Cool

(Cool) routine chop

Defined as:

sub chop(Str(Cool))
method chop()

Coerces the invocant (or in sub form, its argument) to Str, and returns it with the last character removed.

say 'perl'.chop;                        # OUTPUT: «per␤»

class Str

From Str

(Str) routine chop

multi method chop(Str:D:)
multi method chop(Str:D: Int() $chopping)

Returns the string with $chopping characters removed from the end.

say "Whateverable".chop(3.6);  # OUTPUT: «Whatevera␤» 
my $string= "Whateverable";
say $string.chop("3");         # OUTPUT: «Whatevera␤»

The $chopping positional is converted to Int before being applied to the string.