What is the List elementAt() method in Dart?

void main(){
  // Create list name
  List name = ['John', 'Hamad', 'Maria', 'Rejoice', 'Elena'];
  // Accessing element at index 3
  // Using elementAt() method
  var element = name.elementAt(3);
  // Display result
  print('The element at index 3 is ${element}');
  // Accessing element the first element
  // Using elementAt() method
  var element2 = name.elementAt(0);
  // Display result
  print('The first element in the list is ${element2}');
  // try to access a negative index
  try
  {
    var element3 = name.elementAt(-2);
    // Display result
    print('The element in the list is at index -1 is  ${element2}');
  }
  on RangeError { 
   // code for handling exception 
   print('Out of bound index error occurred');
  }  
  // try to get the index beyond the list size
 try
  {
    var element3 = name.elementAt(10);
    // Display result
    print('The element in the list is at index -1 is  ${element2}');
  }
  on RangeError { 
   // code for handling exception 
   print('Out of bound index error occurred');
  }  
}