Where should I use var and where val ?

Here's a concise answer to your Kotlin interview question:

When to use var and val in Kotlin

In Kotlin, you should use:

• val (value) for variables that are immutable and don't change their value after initialization.
• var (variable) for mutable variables that can be reassigned a new value during the program's execution.

Use val when:

• The value is constant and doesn't change throughout the program's lifecycle.
• You want to ensure that the variable's value remains the same to avoid unintended modifications.
• The variable is used in a functional programming style, where immutability is preferred.

Use var when:

• The value needs to be updated or reassi...