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Chapter 1. Core Concepts > Constructor Parameters and Arguments
1.13. Constructor Parameters and Arguments
A constructor parameter is special type of local variable that is created as part of a constructor-method definition. Unlike regular local variables, a constructor parameter's initial value can be (or in some cases, must be) supplied externally when a new object is instantiated.
Constructor parameters are not created with the keyword var. Instead, to create a constructor parameter, we simply provide the desired name and variable initializer within the parentheses of a constructor function definition, as shown in the following generalized code:
