Solidity hello_world

gistfile1.txt

pragma solidity ^0.4.25;

contract HELLO_WORLD {
    string message; 
    constructor () public {
        message = 'Hello !!';
    }
    function setName(string _message) public {
        message = _message;
    }
    function getName() public view returns(string) {
        return message;
    }
}