Why I forgot everything and go to the course again again and agian!

Answer 1

Don’t worry, that happens to me sometimes! A lot of stuff is in the course, so I would suggest making small codes to test it out so you (hopefully) don’t forget.

Answer 2

Because you didn't repeat what you learned.

Repeat 1 day later, 2 days, 4 days, 8, 16,...

A good repetition schedule is a severely underestimated tool to remember stuff. You have to gradually transport knowledge from short term to long term memory.

Practice is the most important factor of that, but there are things you don't use as much as others, and trust me: Those ones you *will* forget!

That's basically why even pros have to google stuff they already used.

And a good repetition schedule can take care of that problem.

Answer 3

You just need more practice. Don't worry. One day you'll be able to sit down and write the whole program out without even checking the documentation.

But I have to tell you that programmers, even those with several-years experience, will need to Google things that they forgot.