Spring 5.0 By Example

Simple function without return

Let's understand how we can construct functions without a return value, the following function will not return any value:

fun printGreetings(name:String,greeting:String):Unit{  println(greeting + name)}

There is one difference, in this case, the Unit was introduced; this type of object corresponds to void in Java language. Then, in the preceding code, we have a function without a return. The Unit object can be removed if you want the compiler to understand the function has no return value.