Hands-On Microservices with Kotlin

Expressions

Considering that we have a simple function to return some value:

fun oddOrEven(number: Int): String {  if(number % 2 == 0)    return "odd"  else    return "even"}

It could be used as an expression:

fun oddOrEven(number: Int): String {  return if(number % 2 == 0)    "odd"  else    "even"}

And, of course, we could infer the type:

fun oddOrEven(number: Int) =    if (number % 2 == 0)      "odd"    else      "even"

Other statements could be used as an expression, for example, if we have this function:

fun fizzBuzz(number: Int): String {  if (number % 15 == 0) {    return "FizzBuzz"  } else if (number % 3 == 0) {    return "Fizz"  } else if (number % 5 == 0) {    return "Buzz"  } else {    return number.toString()  }}

We could convert it into an expression:

fun fizzBuzz(number: Int) ...