However, when you want to compare a Boolean variable with the literal Boolean value true or false, it is not necessary to do an explicit comparison, because the result of evaluating a Boolean value is that Boolean value. For example, the expressions
The nicotine in cigarette smoke is a big part of the problem. It raises your blood pressure and heart rate, narrows your arteries and hardens their walls, and makes your blood more likely to clot. It stresses your heart and sets you up for a heart attack or stroke. Know Your Blood Pressure Numbers.
Stay on the safe side and avoid use. High blood pressure: Coconut water might lower blood pressure. It can increase the effects of medications used to lower blood pressure. Discuss your use of coconut water with your healthcare provider if you have blood pressure problems.