Strings are essential for working with text in any programming language. In Kotlin, you can join, or concatenate, strings using the + operator, but Kotlin also offers a more powerful feature: string templates. String templates let you embed variables and expressions directly inside a string using the $ symbol, making your code cleaner and easier to read. Here is how you can use both string concatenation and templates in Kotlin:

This code demonstrates several ways to work with strings in Kotlin. The fullName variable uses the + operator to concatenate firstName, a space, and lastName. The greeting variable shows a string template, where $firstName and $lastName are placed directly inside the string, making the code concise and readable. The nameLength variable goes further by embedding an expression inside ${}—in this case, calculating the length of the full name. String templates let you easily include variable values or even run code within your strings.