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.
Effects of Nicotine on the Body. As one smokes or takes a snuff, the nicotine in the substance reaches the bloodstream or the brain within a very short span of 5-7 seconds. The absorption of nicotine by the body depends on several factors, namely the type of tobacco inhaled or consumed, or the use of filter while smoking.