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JavaScript基础if语句练习 2019-03-25
倪偌卟離
Original
878 people have browsed it

实例

<!DOCTYPE html>
<html>
<head>
	<title>JavaScripe第一节课作业</title>
</head>
<body>
<script type="text/javascript">
	//判断是否为闰年
	var year=1996;
	if(year%4==0){
		alert('闰年');
	}else{
		alert('平年');
	}
	//判断成绩：给学生的具体成绩划分等级，优秀（90-100）、良好（80-89）、良（70-79）、及格（60-69）、不及格（0-59）,输出该学生的成绩是哪个阶段
	var score= 70;
	if(score<=100 && score>=90){
		alert('成绩优秀');
	}else if(score<=89 && score>=80){
		alert('成绩良好');
	}else if(score<=79 && score>=70){
		alert('成绩良');
	}else if(score<=69 && score>=60){
		alert('成绩及格');

	}else{
		alert('成绩不及格');
	}
</script>
</body>
</html>

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