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.
In normal mathematics, numbers begin at negative infinity, count up to zero, then continue on to positive infinity. This is not the case with temperatures since there is an absolute lower bound (absolute zero). In most materials most of the time, the absolute temperature scale just goes from zero to infinity.