If, Then, Else Statement

I am writing a program to calculate student grades. Students receive bonus points for Extra credit work and they also receive penalty for late submission of work.

my statement goes something like
if radxxxxxx.visble = true then txtxxxxxxx.value- numxxxxx.value + 5 (or minus) depending on the radio button I am working with.

I am not sure if anyone can give me assistance based on this scenario but if someone can I’d be grateful.