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.
Caffeine, in any form, raises your heart rate, and nicotine also raises your heart rate. âCombine the two, and your heart is going into overtime.â Do this everyday for years on end, and youâre probably doing some serious, lasting damage.