Multiple Conditions in When Branches

Multiple Conditions in When Branches in Kotlin

When you want your Kotlin code to make decisions based on more than one value or condition, the when expression provides a powerful and readable way to do this. Unlike traditional if statements, when lets you group several possible matches into a single branch, making your code cleaner and easier to understand.

In this chapter, you will learn how to:

• Combine multiple values or conditions in a single when branch;
• Use commas to group cases for concise logic;
• Apply these techniques to real-world problems, such as handling user input or categorizing data.

By the end of this chapter, you will be able to write more flexible and efficient decision-making code using Kotlin's when expression.

Why Use Multiple Conditions in When Branches?

Using multiple conditions in a single when branch helps you write cleaner and more efficient code. Here are the main benefits:

• Reduce code duplication by grouping similar cases together;
• Make your logic easier to read and maintain;
• Handle related values with a single action, improving clarity;
• Simplify complex decision-making by combining conditions in one place.

This approach is especially helpful when different values should trigger the same result or behavior.