isPrime static method

bool isPrime(int number)

Check if number is prime

number - The number to check Returns true if number is prime

Implementation

static bool isPrime(int number) {
  if (number < 2) return false;
  if (number == 2) return true;
  if (number % 2 == 0) return false;

  for (int i = 3; i * i <= number; i += 2) {
    if (number % i == 0) return false;
  }

  return true;
}