I started programming when I was nine, by myself. With game maker, which was (is?) a visual language to make games. I remember banging my head against the table

I started programming when I was nine, by myself. With game maker, which was (is?) a visual language to make games. I remember banging my head against the table trying to understand what a "real" number was. Even square roots were black magic back in the day. Where I could learn the most was in code examples. They provided me new concepts I could poke, modify the values, and see the output, and hopefully after some time I would be able to understand how to use it. There's a trend that everyone should understand how to code, and python is used as the língua franca for beginners, so providing a lot of examples helps people that do not intend to work as a developer understand new concepts. First you read about it, then you play with it for a while, and finally you'll get how to use it (and when to) in the future.