In this tutorial, we will learn about if expression in Kotlin. In Kotlin “if” is not a keyword(as it was in Java). In Kotlin “if” is an expression and it returns a value. In mean ordinary “If expression” in Kotlin can work just like a ternary operator(condition ? then: else) of Java. Apart from this, we can also use “if-else” as simple blocks the same as other languages(Java or c).
Example Program:
In this example, we will use “if-else” as simple blocks.
fun main(args: Array<String>) {
var num1=20
var num2=10
var max:Int
if (num1 > num2) {
max = num1
} else {
max = num2
}
println("Max is "+max)
}
Example Program:
In this example, we will use “if” as expression.
fun main(args: Array<String>) {
var num1=20
var num2=10
val max = if (num1 > num2) num1 else num2
print("Max is ="+max)
}
Example Program:
It is important “if ” expression can still return value while using as blocks the last statement of the block can be used to return value.
fun main(args: Array<String>) {
var num1=10
var num2=2
val max = if (num1>num2) {
println("num1 is big")
num1
} else {
println("num2 is big")
num2
}
println("Value of max ="+max)
}