Node.js) 백준 2744번: 대소문자 바꾸기

https://www.acmicpc.net/problem/2744

2744번: 대소문자 바꾸기

const input = require('fs').readFileSync('./dev/stdin').toString().trim();

let answer = '';
for (let i = 0; i < input.length; i++) {
	const code = input[i].charCodeAt(0);
	if (code >= 65 && code <= 90) {
		answer += String.fromCharCode(code + 32);
	} else {
		answer += String.fromCharCode(code - 32);
	}
}
console.log(answer);