“Prime Check Jaba” Code-Antworten

Prime Check Jaba

 static boolean isPrime(int n){
        boolean result=true;
        if(n <= 1) return false;
        for(int i = 2; i <= n/2; i++){
            if(n % i == 0){
                result = false; //if some number divides it, then prime=false;
                break;
            }
        }
        return result;
    }
Powerful Polecat

Prime Check Jaba


boolean isPrime(long n) {
    if(n < 2) return false;
    if(n == 2 || n == 3) return true;
    if(n%2 == 0 || n%3 == 0) return false;
    long sqrtN = (long)Math.sqrt(n)+1;
    for(long i = 6L; i <= sqrtN; i += 6) {
        if(n%(i-1) == 0 || n%(i+1) == 0) return false;
    }
    return true;
}
Frightened Flamingo

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