input string use in a for-statement

[Nikolai]

Hello,

I have this piece of code:

Var1 = xxx;
Var2 = xxx;
...
...
EingParameter = input ("Veränderbaren Parameter: ","s")
EingPStart = input ("Parameter Startwert eingeben ")
EingPEnd = input ("Parameter Endwert eingeben ")
EingPSteps = input ("Paramter Anzahl eingeben ")

for EingParameter = linspace(EingPStart,EingPEnd,EingPSteps)

What I want is, for the user to enter the name of a variable  in the 
first input prompt so that the for-expression uses that corresponding 
variable. I know that this code won't work the way i want it to, but 
ideally it would look like this.

Does anyone know what I would have to do, to get this working the way I 
want to?

Thanks in advance for any help!

Nikolai