// Solidity program to // demonstrate the // exponentiation operation pragma solidity ^0.4.18; // Creating a contract contract gfgExpo { // Declaring the state // variables uint16 firstNo ; uint16 secondNo ; // Defining the first function // to set the value of // first variable function firstNoSet(uint16 x) public { firstNo = x; } // Defining the function // to set the value of // the second variable function secondNoSet(uint16 y) public { secondNo = y; } // Defining the function to // calculate the exponent function Expo() view public returns (uint256) { uint256 answer = firstNo ** secondNo ; return answer; } } 0.4.18