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.
When adding zero to any number, the quantity. does not change; zero is the identity element. for addition, also known as the additive. identity. In symbols, for any a, a + 0 = 0 + a =. a.