Create calculator56

public class FactorialCalculator { public static void main(String[] args) { int number = 5; /calculator56

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+public class FactorialCalculator {
+    public static void main(String[] args) {
+        int number = 5; // Change this to the desired number
+        long factorial = calculateFactorial(number);
+        System.out.println("Factorial of " + number + " is " + factorial);
+    }
+
+    public static long calculateFactorial(int n) {
+        if (n < 0) {
+            throw new IllegalArgumentException("Input must be a non-negative integer");
+        }
+        if (n == 0) {
+            return 1;
+        }
+        return n * calculateFactorial(n - 1);
+    }
+}