Multiples of 3 and 5

Author: Eric Hodges

https://projecteuler.net/problem=1

If we list all the natural numbers below 10 that are multiples of 3 or 5, we get 3, 5, 6 and 9. The sum of these multiples is 23.

Find the sum of all the multiples of 3 or 5 below 1000.

Source code: prob001-eric256.pl

use v6;

my $sum;
for (1..^1000) -> $n { $sum+=$n unless $n % 5 and $n % 3};
$sum.say;