how to access variable from another function

I want to build two functions, the first one has basic equations, and the second one for channel modeling, my question is how to access a variable from the first function in the second function? because I want to assign values for the variables available in the first function, in the second function for example I will try for different temperature values can any one help?

[Stephen23]

Either pass them as arguments or use nested functions. What have you tried so far?

Answer 1

[madhan ravi]

Use nested function