Simple question for deterministic functions

It is written in oracle documents about deterministic functions:
"Indicates that the function returns the same result value whenever it is called with the same values for its parameters."
I am wondering is it cached? or is it performing in run time?
for example when we execute a sql stement just one time and if we execute it again will the deterministic function performed?

I am wondering is it cached? or is it performing in run time?
PL/SQL Subprograms
If result caching is enabled and the function was already called before with the same parameter value(s) (implying the result was cached) then the cached result gets returned (if still in the cache) without running the function code to compute the result.
Regards
Etbin

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