Should the file path end with a slash or not?

Question

linux

There was a question about the slash in linux:
what is the difference between two such paths

/home/myprofile/somedir/

/home/myprofile/somedir

I can’t understand if a slash is needed at the end and whether it matters, it’s just that the extension is always indicated in win, .ext if it’s a file, or nothing if it’s a folder.
Can you explain?

Answer 1

The path to the file cannot end with a slash
The path to the directory can

Answer 2

A slash at the end means a directory, no slash means a file.

Answer 3

The first one points to a folder
The second one to a file without an extension