In TypeScript, constructor parameters can be declared with access modifiers (e.g. public, private, protected) and/or type annotations. The parameters are then automatically assigned to properties of the same name within the constructor, and can be accessed within the class. For example:
class Example {
constructor(private name: string, public age: number) {}
}In this example, the constructor has two parameters: name and age. name has a private access modifier, so it can only be accessed within the Example class. age has a public access modifier, so it can be accessed from outside the class as well.
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