Variables and Constants
Variables and constants are used to hold values or expressions. Think back to your ninth-grade algebra class. In the equation 2 + y = x, y is the variable. See, your teacher was right—this may prove useful yet. Variables can have any name. So “y” or “x” is a valid name. But they should be named something that makes sense. Consider which of the following is easier to follow. 2 + y = x or 2 + strVariablePercent = strPercentMarkUp. I would say you can understand more from the second equation than the first, even without knowing the context. Add a line of comments, note the proper case, and you are on your way to well-formatted descriptive rules.
A variable is a value that changes depending on parameters and when it is used. ...
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