What is the best or easiest code that you can use for security(btw i already have an almost complete understanding of HTML )

Question

Ive just recently finished HTML and am looking for any code that is either easy or better to do that can be used for (software) security purposes. I have no clue so please help me. I would be greatful

Answer 1

Cpp, Python, Javascript, PHP and SQL as long as you learn to configure them correctly.