As we already seen in a previous chapter we can use a junction to check if a values is among a given set of values
examples/junctions/intro.p6
#!/usr/bin/env perl6
use v6;
my $possible_options = 1|2|3;
my $c = prompt "please give a number(1,2 or 3): ";
if $c == $possible_options {
say "Correct choice: $c";
} else {
say "Incorrect choice: $c";
}