Sometimes, the number of parameters is not known in advance. In such cases, we can add a vararg modifier to a parameter. It allows the function to accept any number of arguments. Here is an example, where the function is printing the sum of multiple integers:
fun printSum(vararg numbers: Int) {
val sum = numbers.sum()
print(sum)
}
printSum(1,2,3,4,5) // Prints: 15
printSum() // Prints: 0 Arguments will be accessible inside the method as an array that holds all the provided values. The type of the array will correspond to a vararg parameter type. Normally we would expect it to be a generic array holding a specified type (Array<T>), but as we know, Kotlin has an optimized type for arrays of Int called IntArray, so this type will be used. Here, for example, is the type of the vararg parameter with the type String:
fun printAll(vararg texts: String) {
//Inferred type of texts is Array<String>
val allTexts...