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.
We talk about that level of precision as how many significant digits the number has. The significant digits in a number start at the first non-zero digit and end at the last digit. Examples: 1417 has four significant digits, and so do 1.417 and 0.00001417.