How to do calculation with Boolean parameters and return integer value from function

[Steve143]

encRequested	dinRequested	pinRequested	prime	Inter type
False	Undefined or False	Undefined or False	Both	1
True	True	False	Both	2
True	False	True	Both	3
True	True	True	prime = true	3
True	True	True	prime = false	2

I am trying to write an internal function to calculate and return 1,2, or 3 based on values of those four fields called (encRequested, dinRequested, pinRequested, and prime). By parameters I have passed those fields' value to the function. I just need help to calculate those Boolean return values and return integer value for Inter type. I have to finish it in script include function and return value will be part of command line. Thanks in advance.