diff --git a/ProblemSolving/GCD.swift b/ProblemSolving/GCD.swift
new file mode 100644
index 0000000..077056b
--- /dev/null
+++ b/ProblemSolving/GCD.swift
@@ -0,0 +1,13 @@
+//Sayed Mahmudul Alam
+//Greatest Common Divisor
+
+struct GCD {
+    func getGCD(a: Int, b: Int) -> Int {
+        let r = a % b
+        if r != 0 {
+            return getGCD(a: b, b: r)
+        } else {
+            return b
+        }
+    }
+}
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