Job Outlook. Excellent. Respiratory therapists provide care and treatment for patients suffering from breathing and cardiopulmonary difficulties. They may also provide emergency medical care for patients who have experienced asphyxiation, heart attacks, or shock.
0 is a number alone or not. if you put 0 by itself its both a number and a digit.
If the sign bit is 1 then the number is negative, although formats other than two's complement integers allow a signed zero: distinct positive zero and negative zero representations, the latter of which does not correspond to the mathematical concept of a negative number.