If you put attention to the way the author of the video is writing the code you would probably notice that is following a certain naming convention. Some of these conventions are imposed by the compiler and there is no work around that. Other are best practices that will improve the readability of your code. As the majority of the example that you can find in internet follow these conventions I would recommend you to get familiar with the basic as you will save a lot of time in the long run.

via Francesco Lelli at the following url:

https://ift.tt/3e6NAU9

This is a small description of the picture: If you put attention to the way the author of the video is writing the code you would probably notice that is following a certain naming convention. Some of these conventions are imposed by the compiler and there is no work around that. Other are best practices that will improve the readability of your code. As the majority of the example that you can find in internet follow these conventions I would recommend you to get familiar with the basic as you will save a lot of time in the long run.