prime of primes program in java code example
Example 1: java prime numbers
public class Main {
public static void main(String[] args) {
for (int i = 2; i < 1_000_000; ++i) {
boolean isPrime = true;
int sqrt = (int)Math.ceil(Math.sqrt(i));
for (int divisor = 2; divisor <= sqrt; ++divisor) {
if (i % divisor == 0) {
isPrime = false;
break;
}
}
if (isPrime) {
System.out.println(i);
}
}
}
}
Example 2: prime number program in java
public class Prime {
public static void main(String[] args) {
int num = 29;
boolean flag = false;
for(int i = 2; i <= num/2; ++i){
if(num % i == 0){
flag = true;
break;
}
}
if (!flag)
System.out.println(num + " is a prime number.");
else
System.out.println(num + " is not a prime number.");
}}