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.
Zero is called the origin, and it's neither negative nor positive. Every number on the number line also has an absolute value, which simply means how far that number is from zero. The symbol for absolute value is two vertical lines.