Claim:
The user enters the year interval to be judged, the start year and the end year, and outputs all leap years in this interval.
Code:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
</head>
<body>
<script>
function isRunYear(year) {
// 是闰年返回true,否则返回false
var flag = false;
if (year % 4 == 0 && year % 100 != 0 || year % 400 == 0) {
flag = true;
}
return flag;
}
function printRunYear(start, end) {
var runYear = [];
// 定义数组储存闰年
for (var i = start; i <= end; i++) {
// 遍历设定的所有年份
if (isRunYear(i)) {
runYear[runYear.length] = i;
}
// 调用isRunYear()函数，判断是否为闰年
// 如果是闰年，则将该年份存到数组中
}
return runYear;
// 返回闰年数组
}
var start = Number(prompt('请输入开始年份：'));
var end = Number(prompt('请输入结束年份：'));
var allRunYear = printRunYear(start, end);
console.log(allRunYear);
</script>
</body>
</html>