Calculates product of prime factors of a number

main.dart

///Checks if a number is prime
bool checkPrime(x) {
  int factors = 0;
  int i = 1;

  //He number of factors of the number
  while (i <= x) {
    factors = x % i == 0 ? factors + 1 : factors;
    i++;
  }

  //If there are only 2 factors, it is prime
  return factors == 2;
}


int primeProduct(num) {
  int i = 2;
  if (num < 2) {return 0;}
  int product = 1;
  while (i <= num) {
    product = checkPrime(i) ? product * i : product;
    i++;
  }
  return product;
}

void main() {
  print(primeProduct(0));
}