Program for notes with code or about code?

Question

Notes

More recently, I began to learn Javascript on my own, from the sea of ​​\u200b\u200binformation I want to select text with a code, with a description, and save it somewhere for repetition and use.
Please tell me a multiplatform solution for win / macOs.
Thought about Evernote or OneNote, but maybe there is something special for programmers?

Answer 1

Try Markdown .
And there are implementations on all platforms and Github understands it.

Answer 2

My Tetra