package operator;
public class Operator1 {
    public static void main(String[] args) {
        //변수 초기화
        int a = 5;
        int b = 2;
        
        //덧셈
        int sum = a + b;
        System.out.println("a + b = " + sum); //출력: a + b = 7
        
        //뺄셈 
        int diff = a - b;
        System.out.println("a - b = " + diff); //출력: a - b = 3
        
        //곱셈
        int multi = a * b;
        System.out.println("a * b = " + multi); //출력: a * b = 10
        
        //나눗셈
        int div = a / b;
        System.out.println("a / b = " + div); //출력: a / b = 2
        
        //나머지
        int mod = a % b;
        System.out.println("a % b = " + mod); //출력: a % b = 1
    }
}

 package operator;
 public class Operator2 {
    public static void main(String[] args) {
        //문자열과 문자열 더하기1
        String result1 = "hello " + "world";
        System.out.println(result1);
        //문자열과 문자열 더하기2
        String s1 = "string1";
        String s2 = "string2";
        String result2 = s1 + s2;
        System.out.println(result2);
        //문자열과 숫자 더하기1
        String result3 = "a + b = " + 10;
        System.out.println(result3);
        //문자열과 숫자 더하기2
        int num = 20;
        String str = "a + b = ";
        String result4 = str + num;
        System.out.println(result4);
    }
 }