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.
How does yogurt consumption affect blood pressure? Yogurt has many health benefits. It is a cheap, low-calorie source of calcium, protein and other daily nutrients. It keeps you feeling fuller for longer and also provides fluid necessary for proper hydration. How might it lower blood pressure? One possibility might be simple behaviour modification.