Welcome! In this lesson, we will delve into the practical applications of string operations and type conversions in TypeScript. By leveraging TypeScript's type safety features, we can write robust code that handles time parsing more reliably. Have you ever wondered how to add a specific number of seconds to a given time? By the end of today's session, you'll be equipped to perform this calculation using TypeScript. Let's get started!

Imagine this: You receive a time formatted as a string in HH:MM:SS, where HH, MM, and SS denote the hour, minute, and second, respectively. You are also given an integer representing a number of seconds. Your task is to calculate the new time after adding the provided seconds and output the result in the HH:MM:SS format.

For example, if the input time is 05:10:30 and the number of seconds to add is 123, the output should be 05:12:33, since 123 seconds translate to 2 minutes and 3 seconds.