HelloWorld sol

HelloWorld.sol

// My First Smart Contract 
// SPDX-License-Identifier: GPL-3.0
pragma solidity >=0.5.0 <0.7.0;


contract HelloWorld {
    uint inputNumber;

    function storeNumber(uint x) public {
        inputNumber = x;
    }

    function retrieveNumber() public view returns (uint) {
        return inputNumber;
    }
}