DAY12 基本余数 运算符2

运算符

package base;

public class demo06 {
    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);10
        //字符串连接符    +  ，string
        System.out.println(""+a+b)；1020
        System.out.println(a+b+"");30

// 三元运算符

package base;

public class demo07 {
    public static void main(String[] args) {
        //x  ?  y : z
        //如果x==true,则结果为y,否则结果为z
        int score = 50;
        String type =score < 60? "不及格" :"及格";
        //if
        System.out.println(type);

    }