From 454bd8c0989d0e6b99163bba2d1fb8a1b87cb2eb Mon Sep 17 00:00:00 2001
From: Alena Bandarovich <alena.bandarovich@informatik.hs-fulda.de>
Date: Fri, 9 Feb 2024 22:57:37 +0100
Subject: [PATCH] Create factorial calculation method

---
 src/main/java/Calculations.java | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/src/main/java/Calculations.java b/src/main/java/Calculations.java
index 74654ff..09d1298 100644
--- a/src/main/java/Calculations.java
+++ b/src/main/java/Calculations.java
@@ -2,4 +2,18 @@ public class Calculations {
     public int calculateSquare(int num) {
         return (num * num);
     }
+
+    public int calculateFactorial(int num) {
+        if (num < 0) {
+            throw new IllegalArgumentException("Factorial is not defined for negative numbers");
+        }
+        if (num == 0 || num == 1) {
+            return 1; // Factorial of 0 and 1 is 1
+        }
+        int factorial = 1;
+        for (int i = 2; i <= num; i++) {
+            factorial *= i;
+        }
+        return factorial;
+    }
 }