The number of objects in this list.

The valid indices for a list are0 throughlength - 1.

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

Implementation

int get length => JS("int", "#.length", this);

Setting thelength changes the number of elements in the list.

The list must be growable.IfnewLength is greater than current length,new entries are initialized tonull,sonewLength must not be greater than the current lengthif the element typeE is non-nullable.

final maybeNumbers = <int?>[1, null, 3];maybeNumbers.length = 5;print(maybeNumbers); // [1, null, 3, null, null]maybeNumbers.length = 2;print(maybeNumbers); // [1, null]final numbers = <int>[1, 2, 3];numbers.length = 1;print(numbers); // [1]numbers.length = 5; // Throws, cannot add `null`s.

Implementation

set length(int newLength) {  throw new UnsupportedError("Cannot resize immutable List.");}