Added Documentation and updated to current status

tutorial-01/myfirstcontract.sol

@@ -1,21 +1,44 @@
-pragma solidity ^0.5.0;
+//SPDX-License-Identifier: Unlicense
+// Providing the Licence type to the compiler which is added to the top as a comment
 
+//Specifing the version of compiler used to compile the contract
+pragma solidity ^0.8.0;
+
+//contract is the keyword like class to create a new Contract
 contract MyFirstContract {
+
+    //Visibility is set to private so that variables are only accessible inside the contract
     string private name;
     uint private age;
 
+    /**
+    @dev To set the name to the name provided by the user
+    @param newName To get the name from the user to store it in the Blockchain
+    memory is a keyword used to temporarily store data in the Blockchain 
+    */
     function setName(string memory newName) public {
         name = newName;
     }
 
+    /**
+    @dev To get the value of name from the Blockchain as the variable are set private
+    memory is a keyword used to temporarily store data in the Blockchain 
+    */
     function getName() public view returns (string memory) {
         return name;
     }
 
+    /**
+    @dev To set the age to the name provided by the user
+    @param newName To get the age from the user to store it in the Blockchain
+    */
     function setAge(uint newAge) public {
         age = newAge;
     }
 
+    /**
+    @dev To get the value of age from the Blockchain as the variable are set private
+    */
     function getAge() public view returns (uint) {
         return age;
     }