// CSE 142, Autumn 2009, Marty Stepp
// This "module" class is not a complete program.
// It just contains global static code to be used by other client programs.

public class FactorsModule {
    // static 'global' variables  (usually bad, unless final)
    public static final int FIRST_PRIME = 2;

    // Returns the number of factors of the given integer.
    public static int countFactors(int number) {
        int count = 0;
        for (int i = 1; i <= number; i++) {
            if (number % i == 0) {
                count++;   // i is a factor of the number
            }
        }
        return count;
    }
    
    // Returns true if the given number is prime.
    public static boolean isPrime(int number) {
        return countFactors(number) == 2;
    }
}