From 67fb6c0eb507965836201551f90c7d637bf6cee0 Mon Sep 17 00:00:00 2001
From: Hunter Kvalevog <hunter@kvog.sh>
Date: Sun, 27 Sep 2026 17:28:34 -0500
Subject: rustlings: complete 18

---
 rustlings/exercises/18_iterators/iterators4.rs | 1 +
 1 file changed, 1 insertion(+)

(limited to 'rustlings/exercises/18_iterators/iterators4.rs')

diff --git a/rustlings/exercises/18_iterators/iterators4.rs b/rustlings/exercises/18_iterators/iterators4.rs
index c296f0e..f153786 100644
--- a/rustlings/exercises/18_iterators/iterators4.rs
+++ b/rustlings/exercises/18_iterators/iterators4.rs
@@ -10,6 +10,7 @@ fn factorial(num: u64) -> u64 {
     // - additional variables
     // For an extra challenge, don't use:
     // - recursion
+    (1..=num).reduce(|a, b| a * b).unwrap_or(1)
 }
 
 fn main() {
-- 
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