As an API development tool, Postman is widely used by developers for testing, documenting, and sharing APIs. This functionality allows developers to manipulate request parameters, add dynamic variables, and perform various computations or validations before the actual API request is made. In addition to pre-request scripts, Postman also offers a powerful feature called environmental variables.

To use environmental variables in Postman, developers can define a set of variables in an environment file.

In Postman, the addQueryParams function is a JavaScript function that allows developers to easily add query parameters to a URL.
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