sieve_of_eratosthenes.swift

let N = 1000;
var i = 2;
var array = Bool[](count:N, repeatedValue:true);

for i in 2..array.count {
    for var j = 2; j * i < array.count; ++j {
        if array[j * i] {
            array[j * i] = false
        }
    }
}

for i in 2..array.count {
    if array[i] {
        println(i);
    }
}

It doesn't work anymore. It's very outdated.