TypeScript for Beginners - Using Optional Parameters

The video tutorial explains the concept of optional parameters in functions. It starts by discussing the need for optional parameters when not all arguments are required for a function to work. The tutorial then demonstrates creating a 'display' function that takes three arguments: ID, name, and role. It shows how to make the 'role' parameter optional using a question mark and handle cases where the parameter is not provided, ensuring the function does not display 'undefined'. The tutorial emphasizes the importance of checking for undefined values and provides a step-by-step guide to implementing this logic.

What is the purpose of using optional parameters in functions?

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How can you define a parameter as optional in a function?

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Explain the significance of the question mark symbol when defining function parameters.

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What should you check for when using optional parameters to avoid displaying 'undefined'?

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What happens if an optional parameter is not passed when invoking a function?

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