1.2 KiB
1.2 KiB
| title |
|---|
| Functions |
Functions
Basic Usage
Declaration
fun keyword is used to define the function
a and b are input parameters of type Int
Int (after brackets) is matching the return type
fun sum(a: Int, b: Int): Int {
return a + b
}
Same expression can be shortened (omit function brackets), meaning that return type is infered.
Return keyword can be also omited in such expression body
fun sum(a: Int, b: Int) = a + b
Return type can also be omitted (you don't have to use void return type) if function does not return anything
fun printSum(a: Int, b: Int) {
println("sum of $a and $b is ${a + b}")
}
Usage
Simple method call:
val result = sum(2, 3)
Named arguments in method call:
val result = sum(a = 1, b = 5)
Support of default arguments (if parameter is not provided in method call):
fun write(content: String, destination: String = "/tmp/") { ... }