Create a list of undefined user vars?

[cyrille de brébisson]

Hello,

Yes, you can create a list of undefined variables, to do so, you need to use the CAS (which can do it), and transform the CAS result in a home result.
For example L1:=CAS("{a, b, c, d}") will work.

Now, the question about the INPUT(L1) not working is a different one.
INPUT(A), as you know asks you to input a value for the variable A.
therefore INPUT(L1) should ask you a value for variable L1, not for the variables contained in the list stored in L1.
It's a case of 'you can not have the butter and the money from the butter'...

The first parameter of INPUT is one of these special cases where the parameter is NOT evaluated by the function.

So, how do you deal with the situation?
Well, one way is to generate an INPUT call with the CONTENT of L1 as a parameter. exrp("INPUT("+string(L1)+")"); will do that.
It creates a string that contains the command and then executes it!

Cyrille