i am testing native mobile app please tell me how to set variables to scenario and how to run how i will get output
What do you mean by "to set variables"?
When you record your native mobile application with NeoLoad, you will get a script in NeoLoad with all the HTTP requests exchanged between your application and your server.
NeoLoad works at protocol level so you will be able to see all the parameters and data in the HTTP requests like credentials if any.
That way with NeoLoad variables you will be able to vary your script and to run it.
Please look at the NeoLoad tutorials here