1 files changed, 9 insertions, 0 deletions
diff --git a/factorial.hpp b/factorial.hpp
new file mode 100644
index 0000000..ddc0bac
--- /dev/null
+++ b/factorial.hpp
@@ -0,0 +1,9 @@
+#pragma once
+
+long unsigned factorial(unsigned p) {
+  if (p == 0) {
+    return 1;
+  } else {
+    return p * factorial(p - 1);
+  }
+}