package com.chen.operator;
public class Demo07 {
public static void main(String[] args) {
int a = 10;
int b = 20;
a += b;// a = a + b
a -= b;// a = a - b
System.out.println(a);
//字符串链接符 + ， String
System.out.println(""+a+b);
System.out.println(a+b+"");
System.out.println(a+""+b);
}
}