Kotlin: Single Expression functions

When a function returns single expression, you can omit curly braces.

Ex

fun square(num: Int) = num * num

fun cube(num: Int) = num * num * num

FunctionDemo.kt

fun square(num: Int) = num * num
fun cube(num: Int) = num * num * num

fun main(args: Array<String>) {
 println("Square of 5 is ${square(5)}")
 println("Cube of 5 is ${cube(5)}")
}

Output

Square of 5 is 25
Cube of 5 is 125

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