We can use the spread operator that basically spreads the elements to make arrays compatible with varargs. fun sampleFunction(args : Array)) // array to varags To call a function that accepts Array we must pass the arrays as an argument in the function call. You can write a function that accepts an array as a parameter with a type, for example, our main function() accepts an array of Strings. Kotlin foreach index using indices The indices function returns the range of valid indices of the collection. val allColours = arrayOf('red', 'blue', 'green', 'White', 'black')ĪllColours. toMutableList() asList() in arraysĪsList() function returns a List that wraps the original array.

Kotlin standard library has toList() function which will convert the given array into a list Immutable array val allColours = arrayOf('red', 'blue', 'green', 'White', 'black')ĪllColours. Println(allColours.lastIndex) convert array to list in kotlin LastIndex is always equal to array.size -1 val allColours = arrayOf('red', 'blue', 'green', 'White', 'black') with a static List foreach(Arrays.asList(elt1, elt2).

LastIndex property in arrays returns the last valid index if you try to access any index after the last index you might face . When using the counterName parameter to force the loop index attribute name.