Factorial
13 Aug, 2021Problem
Enter a natural number N to get the value of N!. N! = n(n-1)(n-2)…2*1. If N=5 then 5!=54321=120.
input
In the first line, the natural number N (3<=n<=10) is entered.
5output
Print the N factorial value on the first line.
120Solution
plus
function solution(n) {
let answer = 1;
function DFS(l) {
if (l > n) return;
answer *= l;
DFS(l + 1);
}
DFS(1);
return answer;
}subtract
function solution(n) {
let answer;
function DFS(n) {
if (n === 1) return 1;
else return n * DFS(n - 1);
}
answer = DFS(n);
return answer;
}