case判断语句

2024年4月19日发(作者：)

case判断语句

案例一：判断语句用于判断成绩等级

```

int score = 85;

String grade;

if(score >= 90){

grade = "优秀";

}else if(score >= 80){

grade = "良好";

}else if(score >= 70){

grade = "中等";

}else if(score >= 60){

grade = "及格";

}else{

grade = "不及格";

}

n("成绩等级为：" + grade);

```

案例二：判断语句用于判断数字的正负性

```

int num = -5;

String numberType;

if(num > 0){

numberType = "正数";

}else if(num < 0){

numberType = "负数";

}else{

numberType = "零";

}

n("数字类型为：" + numberType);

```

案例三：判断语句用于判断一个年份是否为闰年

```

int year = 2020;

boolean isLeapYear;

if(year % 400 == 0){

isLeapYear = true;

}else if(year % 100 == 0){

isLeapYear = false;

}else if(year % 4 == 0){

isLeapYear = true;

}else{