백준 27433.팩토리얼 2 (재귀함수)

재귀함수를 이용한 팩토리얼 풀기

const fs = require('fs');
const filePath = process.platform === 'linux' ? 
      '/dev/stdin' : './input.txt';

const input = Number(fs.readFileSync(filePath).toString())

let answer=input
const sycle=(num)=>{
    if(num<1){
        return 1
    }
    return num*sycle(num-1)
}

console.log(sycle(answer))