What is the difference between mutable and immutable collections in Scala?

What is the difference between mutable and immutable collections in Scala?

In Scala, mutable collections can be changed after they are created, while immutable collections cannot be modified once created.

Can you give me examples of each?

Sure! An example of a mutable collection is ArrayBuffer, and an example of an immutable collection is List.

When should I use immutable collections?

You should use immutable collections when you want to ensure that your data cannot be changed, which can help avoid bugs and make your code easier to reason about.

Are there performance differences between them?

Yes, mutable collections can be more efficient for certain operations since they allow in-place modifications, while immutable collections may require creating new instances.