选择结构
if:如果 else:否则 break:跳出 continue:持续 match:匹配
gender:性别 random:随机数 score:成绩
示例:1
public class Demo{
public static void main(String[]args){
int score=91; //可以把score写成输入;(详情在复习(1))
if(score>=90){
System.out.println("优"); // score>=90时;输出优
}else{
System.out.println("加油"); //score <90时;输出加油
}
}
}
示例:2
嵌套结构:
import java.util.*;
public class Test025 {
public static void main(String[] args) {
Scanner input = new Scanner(System.in);
System.out.println("请输入成绩:");
int score = input.nextInt();
System.out.println("请输入性别:");
char gender = input.next().charAt(0);
if (score <= 10) {
if (gender == ‘男‘) {
System.out.println("进入男子决赛!");
} else if (gender == ‘女‘) {
System.out.println("进入女子决赛!");
}
} else {
System.out.println("淘汰!!");
}
}
}