diff --git a/chapter 6/ex5 b/chapter 6/ex5
new file mode 100644
index 0000000..b0deb18
--- /dev/null
+++ b/chapter 6/ex5	
@@ -0,0 +1,17 @@
+function calcFactorial(nr) { 
+
+  if (nr === 0) { 
+
+    return 1; 
+
+  } else { 
+
+    return nr * calcFactorial(--nr); 
+
+  } 
+
+} 
+
+ 
+
+console.log(calcFactorial(7));