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Sanjay Prajapat
Sanjay Prajapat

Posted on • Edited on • Originally published at sanjayprajapat.hashnode.dev

Variable Arguments(Varargs in koltin)

#kotlin #varargs #programming

To pass variable number of arguments to a function. We can declare function with varargs parameter.

In java looks like

public void println(String.. args) { }

// allow function to accept number of arguments  fun printAnimal(vararg animals:String):Unit{ for (animal in animals) { print("\n $animal") } } fun printAnimal2(a1: String, vararg animals:String):Unit{ print("first -> $a1") // elephant // first argument goes in starting parameter  for (animal in animals) { print("\n $animal") } }
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fun main(args: Array<String>) { printAnimal("Lion", "Cheetah", "Cat", "Hayena") print("\n") printAnimal2("Elephant","Lion", "Cheetah", "Cat", "Hayena") }
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Passing List of Function to function

fun passFun(vararg funs:()->Unit){ for (f in funs) { f() // to call function  } } fun f1(){ print("function 1 ,") } fun f2(){ print("function 2 ") }
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fun main(args: Array<String>) { // passing reference of function passFun(::f1,::f2) // function 1 , function 2 }
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Generic function

fun <T> printAny(vararg varg: T) { varg.forEach { println(it) } }
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fun main(args: Array<String>) { printAny(34,56,89) }
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Original post on sanjayprajapat.hashnode.dev

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