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( Parameter)
In mathematics, statistics, and the mathematical sciences, a parameter (G auxiliary measure) is a quantity that defines certain characteristics of systems or functions. In different contexts the term may have special usages. Mathematical functions typically can have one or more variables and zero or more parameters. The two are often distinguished by being grouped separately in the list of arguments that the function takes The symbols before the semicolon in the function's definition, in this example the x's, denote variables, while those after it, in this example the a's, denote parameters. Strictly speaking, parameters are denoted by the symbols that are part of the function's definition, while arguments are the values that are supplied to the function when it is used. Thus, a parameter might be something like "the ratio of the cylinder's radius to its height", while the argument would be something like "2" or "0.1".
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