const fs = require('fs'); fs.readFile('./1.txt', 'utf8', (err, result1) => { console.log(result1); fs.readFile('./2.txt', 'utf8', (err, result2) => { console.log(result2); fs.readFile('./3.txt', 'utf8', (err, result3) => { console.log(result3); }); }); })
