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?

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

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

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

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