prime check java
static boolean isPrime(int n){
boolean result=true;
if(n <= 1) return false;
for(int i = 2; i <= n/2; i++){ //n/2 because the largest factor of any number is either it's half or less than it
if(n % i == 0){
result = false; //if some number divides it, then prime=false;
break;
}
}
return result;
}