JavaScript实现回文数算法
研究轮播图
代码描述
<!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>
</head>
<body>
<script>
function fun() {
let str = '';
str = prompt('输入字符串');
if (str.length <= 2) {
return console.log('输入用例错误');
}
for (let i = 0; i < parseInt(str.length / 2); i++) {
if (str.charAt(i) !== str.charAt(str.length - 1 - i)) {
return console.log('不是回文数');
}
}
return console.log('是回文数');
}
fun();
</script>
</body>
</html>
