Kotlin If...Else

Kotlin If...Else Statements

Kotlin supports the usual logical conditions from mathematics. You can use these conditions to perform different actions for different decisions.

• Use if to specify a block of code to be executed, if a specified condition is true
• Use else to specify a block of code to be executed, if the same condition is false
• Use else if to specify a new condition to test, if the first condition is false

The if..else Statement

fun main() {
  val time = 20
  if (time < 18) {
    println("Good day.")
  } else {
    println("Good evening.")
  }
}

Kotlin if..else as an Expression

In Kotlin, if can also be used as an expression (it returns a value). This allows you to assign the result of an if-statement directly to a variable.

fun main() {
  val time = 20
  val greeting = if (time < 18) "Good day." else "Good evening."
  println(greeting)
}

Note: When using if as an expression, it must have an else branch.