Demo default params and the effect on calling them

DefaultParams.kt

fun main(args: Array<String>) {

    fun higherOrder(i: Int = 0, f: (Int) -> Int): Int = f(i)

    fun higherOrder2(f: (Int) -> Int, i: Int = 0): Int = f(i)

    higherOrder { it + 1 }.let(::println)
    higherOrder2({ it + 1 }).let(::println) //forced to use () in order to omit default param

    fun value(value: Int, df: Int = 0) = value

    fun value2(df: Int = 0, value: Int) = value


    value(1).let(::println)
    value2(value = 1).let(::println) //forced to use named param in order to skip default param

    
    //as shown above after value and before higher order
    fun valueAndHigher(value: Int, i: Int = 0, f: (Int) -> Int): Int = f(value)
    
    valueAndHigher(2) { it + 1 }
    
}