package operator;

public class Demo01 {
    public static void main(String[] args) {
        //算术运算符
        //ctrl+D 复制当前行到下一行
        int a = 10;
        int b = 20;
        int c = 25;
        int d = 25;
        System.out.println(a+b);
        System.out.println(a-b);
        System.out.println(a*b);
        System.out.println(a/b);
        System.out.println(a/(double)b);
    }
}
输出：

30
-10
200
0
0.5

Process finished with exit code 0

算术运算符