Why is closing a file needed?

Question

After opening a file, writing the code, they say you should close it, but I've written a few bits and it seems to be functioning just fine. So why close a file?

Answer 1

I could never have explained it this well

https://stackoverflow.com/questions/25070854/why-should-i-close-files-in-JUMP_LINK__&&__python__&&__JUMP_LINK#25070939

Answer 2

Hyxis

Here is two example to understand why we need to close file.

https://code.sololearn.com/crUScLkCl63q/?ref=app
https://code.sololearn.com/cLYDz5n3OCVy/?ref=app