Many conceptual questions have already been asked and answered. See debugging question guidelines for more info. If you got an error, include the full error message.
The output you expected, and what you got instead.A minimal, easily runnable, and well-formatted program that illustrates your problem.If you need help debugging, you must include: Welcome to LearnProgramming! New? READ ME FIRST! Posting guidelines Frequently asked questions Subreddit rules Message the moderators Asking debugging questions