diff --git a/rs/missing-number.rs b/rs/missing-number.rs
new file mode 100644
index 0000000..a9b9771
--- /dev/null
+++ b/rs/missing-number.rs
@@ -0,0 +1,6 @@
+impl Solution {
+    pub fn missing_number(nums: Vec<i32>) -> i32 {
+        let n = nums.len() as i32;
+        n * (n + 1) / 2 - nums.iter().sum::<i32>()
+    }
+}