How TABLE retreive the variable names?

This example from the doc shows table is able to retrieve the variable names of the iput arguments list and uses them as column name:

LastName = {'Sanchez';'Johnson';'Li';'Diaz';'Brown'};
Age = [38;43;38;40;49];

Then

T = table(LastName,Age)

I get

T =

5×2 table

    LastName     Age
    _________    ___

    'Sanchez'    38 
    'Johnson'    43 
    'Li'         38 
    'Diaz'       40 
    'Brown'      49

For

T = table(LastName,Age+1)

I get

T =

    5×2 table

      LastName     Var2
      _________    ____

      'Sanchez'     39 
      'Johnson'     44 
      'Li'          39 
      'Diaz'        41 
      'Brown'

My question is simple: how can do the same (retrieve the variable names) within my own function?

If yes, same question for output arguments:

bar = foo(123);

can foo retrieves 'bar'?

Answer 1

[Stephen23]

https://www.mathworks.com/help/matlab/ref/inputname.html

[Bruno Luong]

Thanks. It doesn't look like the dual outputname exists?

[Stephen23]

Correct, outputname does not exist.

[Peter Perkins]

inputname can be, and has been, way over-used. A little goes a long way. In particular, it is a really bad idea to get the names of your inputs and then overwrite them using evalin.

You may not have wanted to do that. But don't do that.

[Bruno Luong]

Never use it myself (thus the question), but I can see some circumstances I would want to use it:

1. Put some more meaningful error message or log message
2. Check if the input argument is from an expression of a variable, in the MEX file I might not bother to perform inplace change in the first case to save some memory or duplication.