Node.js

//var.js

const add = '홀수입니다';
const even = '짝수입니다';

module.exports = {
odd,
even,
};

//func.js

const { odd, even } = require('./var');

function checkOddOrEven(num) {
if(num % 2) { 
return odd;
}
return even;
}

//index.js

const { odd, even } = require('./var');
const checkNumber = require('./func');

function checkStringOddOrEven(str) {
if(str.length % 2) { 
return odd;
}
return even;
}

console.log(checkNumber(10));
console.log(checkStringOddOrEven('hello'));

$node index
짝수입니다.
홀수입니다.