Creates a list of the given length.
NOTICE: This constructor cannot be used in null-safe code. Use List.filled to create a non-empty list. This requires a fill value to initialize the list elements with. To create an empty list, use [] for a growable list or List.empty for a fixed length list [or where growability is determined at run-time].
The created list is fixed-length if length is provided.
var fixedLengthList = List[3]; fixedLengthList.length; // 3 fixedLengthList.length = 1; // ErrorThe list has length 0 and is growable if length is omitted.
To create a growable list with a given length, for a nullable element type, just assign the length right after creation:
List growableList = []..length = 500;For a non-nullable element type, an alternative is the following:
List growableList = List.filled[500, 0, growable: true];The length must not be negative or null, if it is provided.
If the element type is not nullable, length must not be greater than zero.