'What are _xlfn and _xlpm in excel mean?

I just received an excel and see there are some formulas including some "_xlfn" and "_xlpm". What do they mean?



Solution 1:[1]

Excel uses _xlfn. for formulas and _xlpm. for LET & LAMBDA arguments for backwards compatibility.

It informs previous versions of Excel that this is a valid formula in the future, and Excel shows the stored values instead of errors.

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Solution 1