# length property

int length
override

Returns the number of objects in this list.

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

## Implementation

    int get length => _source.length;

void length= (int newLength)
inherited

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");
    }