From e3e298cfa21f671f32280f576c3092c62dc81b2a Mon Sep 17 00:00:00 2001
From: seporterfield <107010978+seporterfield@users.noreply.github.com>
Date: Sun, 1 Jan 2023 02:02:15 +0100
Subject: moved iterator exercises

---
 exercises/iterators/iterators4.rs | 40 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 40 insertions(+)
 create mode 100644 exercises/iterators/iterators4.rs

(limited to 'exercises/iterators')

diff --git a/exercises/iterators/iterators4.rs b/exercises/iterators/iterators4.rs
new file mode 100644
index 0000000..a02470e
--- /dev/null
+++ b/exercises/iterators/iterators4.rs
@@ -0,0 +1,40 @@
+// iterators4.rs
+// Execute `rustlings hint iterators4` or use the `hint` watch subcommand for a hint.
+
+// I AM NOT DONE
+
+pub fn factorial(num: u64) -> u64 {
+    // Complete this function to return the factorial of num
+    // Do not use:
+    // - return
+    // Try not to use:
+    // - imperative style loops (for, while)
+    // - additional variables
+    // For an extra challenge, don't use:
+    // - recursion
+    // Execute `rustlings hint iterators4` for hints.
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn factorial_of_0() {
+        assert_eq!(1, factorial(0));
+    }
+
+    #[test]
+    fn factorial_of_1() {
+        assert_eq!(1, factorial(1));
+    }
+    #[test]
+    fn factorial_of_2() {
+        assert_eq!(2, factorial(2));
+    }
+
+    #[test]
+    fn factorial_of_4() {
+        assert_eq!(24, factorial(4));
+    }
+}
-- 
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