Primes in Apple's Swift

Primes.swift

import Cocoa
import Foundation

func isPrime(n: Int) -> Bool {
    if n < 2 {
        return false // are not primes
    }
    let limit = Int(sqrt(Float(n)))
    if limit < 2 {
        return true // 2, 3 are primes
    }
    for i in 2...limit {
        if n % i == 0 {
            return false
        }
    }
    return true
}

var primes: [Int] = []
for i in 2...100 {
    if isPrime(i) {
        primes.append(i)
    }
}

print(primes)