Variables in Scala

Before entering into the depth of OOP features, first, we need to know details about the different types of variables and data types in Scala. To declare a variable in Scala, you need to use var or val keywords. The formal syntax of declaring a variable in Scala is as follows:

val or var VariableName : DataType = Initial_Value

For example, let's see how can we declare two variables whose data types are explicitly specified as follows:

var myVar : Int = 50
val myVal : String = "Hello World! I've started learning Scala."

You can even just declare a variable without specifying the DataType. For example, let's see how to declare a variable using val or var, as follows:

var myVar = 50
val myVal = "Hello World! I've started learning Scala."

There are two types of variables in Scala: mutable and immutable that can be defined as...