dart:collection

length property

The number of objects in this list.

The valid indices for a list are 0 through length - 1.

final numbers = <int>[1, 2, 3];
print(numbers.length); // 3

Implementation

int get length => _source.length;

This operation is not supported by an unmodifiable list.

Implementation

set length(int newLength) {
  throw new UnsupportedError(
      "Cannot change the length of an unmodifiable list");
}