Print the first ten odd numbers. Print the first ten even numbers.
Odd numbers are those that have a remainder after division by 2. This fact can be directly exploited in filtering the numbers and printing only those that match this definition.
.say if $_ % 2 for 1 .. 20;
To print even numbers, negate the condition by choosing another keyword: unless, instead of if:
.say unless $_ % 2 for 1 .. 20;
Numbers can be filtered using the grepbuilt-in function:
.say for grep {$_ % 2}, 1..20;
For the odd numbers, negate the condition by using the divisibility operator, which returns True when its first operand is divisible by the second with no remainder:
.say for grep {$_ %% 2}, 1..20;
Another interesting thing that Perl 6 offers is using a sequence. Show Perl the first elements of it, and it generates the rest:
my @odd = 1, 3 ... *;
say @odd[^10];
To print the even numbers, change the sample:
my @odd = 2, 4 ... *;
say @odd[^10];