打印100以内的素数

public class Prime
{
public static void main(String[] args){
for(int i = 1; i < 100 ; i++){
if(isPrime(i)){
System.out.println(i);
}
}

}

private static boolean isPrime(int num){
if(num == 1){
return false;
}

long sprtNum =(long) Math.sqrt(num);

for(int i = 2; i <= sprtNum; i++){
if(num % i == 0){
return false;
}

}

return true;

}

}