Named Parameters

Named parameters are a programming language feature that allows function or method arguments to be passed by specifying their parameter names, rather than relying solely on positional order. This improves code readability and reduces errors by making the purpose of each argument explicit at the call site. It is commonly supported in languages like Python, Kotlin, and Swift, often as an optional or required syntax depending on the language design.

Also known as: keyword arguments, named arguments, keyword parameters, named params, kwargs

Why learn Named Parameters?

Developers should use named parameters when writing functions with multiple arguments, especially optional ones, to enhance code clarity and maintainability in team projects or complex systems. It is particularly useful in APIs, configuration functions, or when dealing with functions that have many parameters, as it prevents bugs from incorrect argument ordering and makes the code self-documenting. For example, in data processing or web development, named parameters can simplify calls to functions with many options, like database queries or HTTP requests.

Learning Resources

• docs: Python Documentation: Keyword Arguments
• docs: Kotlin Docs: Named Arguments
• docs: MDN Web Docs: Functions - Default parameters and destructuring
• docs: Swift Programming Language Guide: Function Argument Labels and Parameter Names
• tutorial: Real Python Tutorial: Python args and kwargs: Demystified