pink老师课程案列
练习if else语句同时巩固逻辑运算符
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<script>
var year = prompt('请输入年份');
if (year % 4 == 0 && year % 100 !== 0 || year % 400 == 0) {
alert('闰年')
} else {
alert('不是闰年')
}
</script>
</head>
<body>
</body>
</html>