Hands-On Object-Oriented Programming with Kotlin

if as an expression

Kotlin has introduced a new feature called if as an expression, which makes a programmer's life much easier. Instead of assigning a value in each if statement, Kotlin returns the value from a successful code block, which can be stored in a variable. Before writing an if statement, add a variable name with an assignment operator as follows:

grade = if (studentMarks >= 90) {    "A"}

See the following example with if as an expression, where grade will be assigned depending on studentMarks:

fun main(args: Array<String>) { val studentMarks = 95 var grade = if (studentMarks >= 90) { "A" } else if (studentMarks >= 80) { "B" } else if (studentMarks >= 70) { "C" } else if (studentMarks >= 60) { "D" } else { "F" } println ( "Student ...