diff --git a/exercises/02_basic_calculator/03_if_else/src/lib.rs b/exercises/02_basic_calculator/03_if_else/src/lib.rs
index 15af33e..0f47aee 100644
--- a/exercises/02_basic_calculator/03_if_else/src/lib.rs
+++ b/exercises/02_basic_calculator/03_if_else/src/lib.rs
@@ -1,6 +1,6 @@
 /// Return `true` if `n` is even, `false` otherwise.
 fn is_even(n: u32) -> bool {
-    todo!()
+    n % 2 == 0
 }
 
 #[cfg(test)]