Gas and Chemical Exposure. NOTE: This is the Consumer Version. Symptoms depend on which gas or chemical is inhaled and how deeply and for how long it was inhaled. Symptoms may include irritation of the eyes or nose, cough, blood in the sputum, and shortness of breath. Chest x-rays, computed tomography, and breathing tests are used to determine how much lung damage has occurred.
Scope refers to the visibility of variables and methods in one part of a program to another part of that program. The importance and meaning of scope varies between languages, but there are two general scope concepts many languages have in common: local and global scope.
Previous: C# Method Parameters. The scope of a variable determines its visibility to the rest of a program. In the examples throughout the C# Fundamentals tutorial, variables have been defined within methods. When created in this way, the scope of the variable is the entire method after the declaration. This means that the variable is available to use within the method but when control passes to another method the variable is unavailable.