# first property

E first

Returns the first element.

Throws a StateError if `this` is empty. Otherwise returns the first element in the iteration order, equivalent to `this.elementAt(0)`.

## Implementation

    E get first {
      if (length == 0) throw IterableElementError.noElement();
      return this[0];
    }

void first= (E value)

Updates the first position of the list to contain `value`.

Equivalent to `theList[0] = value;`.

The list must be non-empty.

## Implementation

    void set first(E value) {
      if (length == 0) throw IterableElementError.noElement();
      this[0] = value;
    }