题解 | #字符逆序#

const rl = require("readline").createInterface({ input: process.stdin });
var iter = rl[Symbol.asyncIterator]();
const readline = async () => (await iter.next()).value;

void (async function () {
    // Write your code here
    while ((line = await readline())) {
        // 方法1：
        // let arr = line.split('');
        // console.log(arr.reverse().join(''));

        // 方法2：
        let str = "";
        for (i = line.length - 1; i >= 0; i--) {
            str += line[i];
        }
        console.log(str);
    }
})();