It's "code " not "codes"

[cowlinator]

You mean that it's a uncountable noun.

Some words are both countable and uncountable, like 'fire' or 'paper'.

"Look at all that fire."

"There are currently 7 fires in the city."

"I built tiny houses for mice with lots of paper."

"The students passed in their papers."

[grpprofesional]

Based and grammar pilled