nth prime number in swift

Question

I\'m trying to find the nth prime number in xCode\'s Swift, but I can\'t seem to get this working, it just gives a list of prime numbers.

func nthPrimeNumber         


        

Answer 1

extension FixedWidthInteger {
    var isPrime: Bool {
        if self <  2 { return false }
        let squareRoot = Self(Double(self).squareRoot())
        if squareRoot * squareRoot == self { return false }
        for i in 2..

---

let twoDigitsPrimeNumbers = (1..<100).filter { $0.isPrime }
print(twoDigitsPrimeNumbers)  // [2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97]

---

func nthPrime(nth: Int)-> Int {
    var primeCounter = 0
    var number = 2
    while true {
        if number.isPrime {
            primeCounter += 1
            if nth == primeCounter { return number }
        }
        number += 1
    }
}
nthPrime(1000)   // 7,919