백준/단계별: 10872 팩토리얼 (#23)

src/baekjoon/step/combinatoric/PROB10872.java

@@ -0,0 +1,25 @@
+package baekjoon.step.combinatoric;
+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStreamReader;
+
+public class PROB10872 {
+    public static int factorial(int n) {
+        // base case
+        if(n == 0) {
+            return 1;
+        } else {
+            return n * factorial(n-1);
+        }
+    }
+
+    public static void main(String[] args) throws IOException {
+        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
+        int N = Integer.parseInt(br.readLine());
+
+        System.out.println(factorial(N));
+
+    }
+
+}

src/baekjoon/step/combinatoric/PROB10872.py

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+# 팩토리얼을 재귀함수로 짜보자
+
+
+# 재귀함수
+def factorial(N):
+    if N == 0:
+        return 1
+
+    return N * factorial(N-1)
+
+# N 을 입력받자
+N = int(input())
+
+# 결과를 출력해보자
+print(factorial(N))