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.
1 There are no fractions or decimals in any part of the numbers. 2  Negative numbers often represent the idea of being below a standard value.  Zero is an integer. In many other number groups whether or not zero is included makes a difference. Note that zero is included in the set of integers.