Dart – Get Element at Specific Index

To get an element at specific index from a List in Dart, call elementAt() method on this list and pass the index as argument. elementAt() method returns the element.

If the index is out of range for the list, then elementAt() throws RangeError.

Syntax

The syntax to get element at specific index index from the List list is

list.elementAt(index)

Examples

In this example, we take a list of integers with five elements, and get elements at index 3, using List.elementAt() method.

main.dart

void main() {
  var list = [2, 4, 8, 16, 32];
  var element = list.elementAt(3);
  print('Element :  $element');
}

Output

Element :  16

RangeError Scenario

In this example, we take a list of integers with five elements, and get elements at index 7, using List.elementAt() method. Since the index is out of bounds from given list, elementAt() throws RangeError.

main.dart

void main() {
  var list = [2, 4, 8, 16, 32];
  var element = list.elementAt(7);
  print('Element :  $element');
}

Output

Unhandled exception:
RangeError (index): Invalid value: Not in inclusive range 0..4: 7
#0      List.[] (dart:core-patch/growable_array.dart:260:36)
#1      List.elementAt (dart:core-patch/growable_array.dart:483:16)
#2      main (file:///Users/tutorialkart/Desktop/Projects/DartTutorial/main.dart:3:22)
#3      _delayEntrypointInvocation.<anonymous closure> (dart:isolate-patch/isolate_patch.dart:297:19)
#4      _RawReceivePortImpl._handleMessage (dart:isolate-patch/isolate_patch.dart:192:12)

Conclusion

In this Dart Tutorial, we learned how to get an element from a list at specified index, with examples.