diff --git a/1.c b/1.c
index e69de29..69b73b3 100644
--- a/1.c
+++ b/1.c
@@ -0,0 +1,11 @@
+#include <iostream>
+int factorial(int n) {
+    return (n == 1 || n == 0) ? 1 : n * factorial(n - 1);
+}
+int main() {
+    int num;
+    std::cout << "Enter a number: ";
+    std::cin >> num;
+    std::cout << "Factorial: " << factorial(num) << std::endl;
+    return 0;
+}