beginner help

i'm currently on the if statements and i'm completely confused at the boolean information, could someone clarify generally how it works.

Well, if an expression is true (nonzero, not false [zero]), do something. Where are you confused?

I read it over, i was just confused at the equations, but its just basically simple math.

My crystal ball is still out... I don't suppose you could post anything helpful?

I understand it i just didn't understand correctly the first time, no help needed.