What is the difference between var and val in Scala?

What is the difference between var and val in Scala?

In Scala, var is a keyword used to declare a mutable variable, which means that its value can be changed after it is initialized. On the other hand, val is used to declare an immutable variable, meaning that its value cannot be changed once it is assigned.

When choosing between var and val, it is generally recommended to use val whenever possible, as immutable variables promote safer and more predictable code. However, vars can be useful in situations where you need to reassign the variable's value during the program execution.

Overall, understanding the difference between var and val in Scala is crucial for writing efficient and maintainable code.