// Solidity program to // demonstrate addition pragma solidity 0.4.18; contract MathPlus { // Declaring the state // variables uint firstNo ; uint secondNo ; // Defining the function // to set the value of the // first variable function firstNoSet(uint x) public { firstNo = x; } // Defining the function // to set the value of the // second variable function secondNoSet(uint y) public { secondNo = y; } // Defining the function // to add the two variables function add() view public returns (uint) { uint Sum = firstNo + secondNo ; // Sum of two variables return Sum; } } 0.4.18