Stop dividing by 0

gistfile1.txt

// Playground - noun: a place where people can play

import Cocoa

func eratosthenes(n: Int) -> [Int]{
    
    var results = Array(1...n)
    
    for i in 1...(n-1){
        var number = results[i]
        
        if (number % i == 0) {
            results[i] = -1
        }
        
    }
    
    return results
}

eratosthenes(10)