public class Main {
public static void main(String[] args) {
System.out.println("Hello" + "world!");
System.out.println("Hello " + "world!");
System.out.println("Hello"); System.out.println("world!");
System.out.print("Hello"); System.out.println(" world!");
System.out.println("3 + 4 = " + 3 + 4);
System.out.println("3 + 4 = " + (3 + 4));
System.out.println("3 - 4 = " + (3 - 4));
System.out.println("3 * 4 = " + (3 * 4));
System.out.println("7 / 3 = " + (7 / 3));
System.out.println("7 % 3 = " + (7 % 3));
int radius; // Αυτό είναι ένα σχόλιο μιας γραμμής
/*
* Αυτό είναι ένα σχόλιο
* πολλαπλών γραμμών.
*/
int radius1;
}
}