Monte Carlo simulation

Dear LAMMPS users ,

I need to learn a program about monte carlo simulation .
I will be grateful If you let me know which one is good for learning in general .

Regards ,
Saeed.

Your question is rather general. What exactly do you want to learn about Monte Carlo? The method in itself is rather simple, and is explained quite rigorously in e.g. Understanding Molecular Simulation. The chapter in that book is also accompanied with pseudocode that you could implement in your own favourite language, which might be more didactical than taking an off-the-shelf code and learning from that: http://lmgtfy.com/?q=monte+carlo+programs

Dear Stefan ,
Thanks for your reply .
I 'd like to use MC simulation for studying " phase transition properties " and also for performing transition matrix Monte Carlo and … .

Best ,
Saeed.