index.js

const readline = require('readline');
let dateNow = new Date().getFullYear() + 543;
let name, year, tel;

const io = readline.createInterface({
    input: process.stdin,
    output: process.stdout
});

let count = 0;
let data = {};
console.log('กรอกชื่อ : ');
io.on('line', (line) => {
    switch (count) {
        case 0:
            data['name'] = line;
            count++;
            console.log('กรอกปีเกิด(พ.ศ.) : ');
            break;
        case 1:
            data['year'] = line;
            count++;
            console.log('กรอกเบอร์โทร : ');
            break;
        case 2:
            data['tel'] = line;
            data['old'] = dateNow - data.year;
            io.close();
            console.log();
            // console.log(data);
            console.log('สวัสดีคุณ : ' + data.name);
            console.log('เบอร์โทร : ' + data.tel);
            // console.log('ปีเกิด : ' + data.year);
            console.log('อายุ : ' + data.old + ' ปี');
            break;
    }
});

io.on('close', () => io.close());