我的循环代码没有增加。

Question

我打算找出直到N的质数。for循环外的代码没有增加。在这种情况下，答案打印为2。

let limit = Int(readLine()!)! 
    var factors = 2          // as prime no.s only have 2 factors
    var countFactors = 0    
    var prime = [Int]()      //array to store prime nos

    for number in 2..<limit {       // to count from 2 till N

        for i in 1...number {

            if(number%i == 0){
            countFactors += 1
            }
        }
        if(countFactors == factors){
            prime.append(n)
        }
    }

    for items in prime {
        print(items)
    }

Answer 1

1）您的代码无法编译。你可能是说

prime.append(number)

2）发生意外行为的原因是，您忘记了在外循环的每次迭代中重置countFactors

...
for number in 2..<limit {       // to count from 2 till N
    countFactors = 0
    for i in 1...number {
...