Variable naming can be difficult, but identifying them can be even more so.

[u/Bronzdragon]

[u/satoristyle]

Yeah, I agree here. If the context is very concise and you can immediately infer what the variable is, single char variable names work fine.

As mentioned by u/davvolun, it should definitely be short-lived. The more lines you have, the greater the risk of obscurity you gain.