If/Else Expressions

The basic structure of if/else expressions in Scala is:

if (condition) {
  expression to execute when condition is true
} else {
  expression to execute when condition is false
}

Consider the following example:

val x = 10
val y = 30
val max = if (x > y) {
    x
  } else {
    y
  }

Result:

max: Int = 30

Because the conditionals are expression in Scala it is possible to assign them to values.

Each branch of the condition and also the condition x > y is also an expression. We can omit curly braces for expressions with one line.

val max = if (x > y) x  else y