Added stringMatching algorithm in Maths (#51)

* Added stringMatching algorithm in Maths

* changed formatting using prettier solidity

Author: sreekar9601

src/Maths/stringMatch.sol

@@ -0,0 +1,31 @@
+// SPDX-License-Identifier: GPL-3.0
+pragma solidity ^0.8.0;
+
+/**
+ * @title String Matching.
+ * @author Sreek  https://github.com/sreekar9601.
+ * @dev Contract to demonstrate matching of two strings.
+ */
+
+contract StringMatch {
+    string firstString;
+    string secondString;
+
+    function setFirstString(string memory _firstString) public {
+        firstString = _firstString;
+    }
+
+    function setSecondString(string memory _secondString) public {
+        secondString = _secondString;
+    }
+
+    function stringMatch() public view returns (bool) {
+        if (
+            keccak256(abi.encodePacked(firstString)) ==
+            keccak256(abi.encodePacked(secondString))
+        ) {
+            return true;
+        }
+        return false;
+    }
+}