system of an electrolyte.

Basically I want to create a simulation box of an electrolyte system with 1M concentration of KCl.
I am not able to understand that how I can write the code for this.
Where I would have to mention the number of atoms.?

please help me in this regard.

Thanks

Basically I want to create a simulation box of an electrolyte system with
1M concentration of KCl.
I am not able to understand that how I can write the code for this.
Where I would have to mention the number of atoms.?

you have asked ​about this before (and in a similar vague fashion) and you
have received good advice.
why​ are you reposting this? and without providing more specific details or
an explanation why the previously provided advice is not applicable or not
helpful?

axel.