check if a number is prime, if it is composite print a list of factors in swift

main.swift
func checkIfNumberIsPrime(_ number: Int) -> Bool {
    guard number > 1 else { return false } // 0, 1 and negative numbers are not primes
    
    for i in 2..<number {
        if number % i == 0 {
            return false
        }
    }
    
    return true
}

func printListFactors(_ number: Int) {
    guard number > 2 else { return } // numbers below 3 have no factors
    
    for i in 2...number/2 {
        if number % i == 0 {
            print(i)
        }
    }
}
475 chars
22 lines

main.swift
let number = 13
if checkIfNumberIsPrime(number) {
    print("\(number) is prime")
} else {
    print("\(number) is composite")
    print("Factors: ")
    printListFactors(number)
}
181 chars
9 lines

main.swift
13 is prime
12 chars
2 lines