From 2a9bd7417638212e17253061027877820aa688fb Mon Sep 17 00:00:00 2001
From: lukaszKielar <kielar.lukasz@hotmail.com>
Date: Tue, 30 Jun 2020 20:06:31 +0200
Subject: [PATCH] finish iterators4 exercise

---
 exercises/standard_library_types/iterators4.rs | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/exercises/standard_library_types/iterators4.rs b/exercises/standard_library_types/iterators4.rs
index 88862838..fb777acc 100644
--- a/exercises/standard_library_types/iterators4.rs
+++ b/exercises/standard_library_types/iterators4.rs
@@ -1,7 +1,5 @@
 // iterators4.rs
 
-// I AM NOT DONE
-
 pub fn factorial(num: u64) -> u64 {
     // Complete this function to return the factorial of num
     // Do not use:
@@ -12,6 +10,7 @@ pub fn factorial(num: u64) -> u64 {
     // For an extra challenge, don't use:
     // - recursion
     // Execute `rustlings hint iterators4` for hints.
+    (1..num + 1).into_iter().fold(1, |acc, x| acc * x)
 }
 
 #[cfg(test)]