diff --git a/Math/HammingDistance.swift b/Math/HammingDistance.swift
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index 00000000..0d339bc7
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+++ b/Math/HammingDistance.swift
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+/**
+ * Question Link: https://leetcode.com/problems/hamming-distance/
+ * Primary idea: Bit manipulation, use xor and right shift
+ *
+ * Time Complexity: O(n), Space Complexity: O(1)
+ */
+
+class HammingDistance {
+    func hammingDistance(_ x: Int, _ y: Int) -> Int {
+        var z = x ^ y, count = 0
+        
+        while z > 0 {
+            count = z & 1 == 1 ? count + 1 : count
+            z = z >> 1
+        }
+        
+        return count
+    }
+}
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