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.
The very deep concept is this. The simplest numbers are the counting numbers -- 1,2,3,4,5,7,8, etc. They do not include 0. Zero is a difficult concept, even though none and nothing are simple concepts. I try to explain it this way. If you have one apple, I can see that you have 1 apple. If you have zero apples, I cannot see that.