The length of the string.
Returns the number of UTF-16 code units in this string. The number of runes might be fewer, if the string contains characters outside the Basic Multilingual Plane (plane 0):
'Dart'.length; // 4 'Dart'.runes.length; // 4 var clef = '\u{1D11E}'; clef.length; // 2 clef.runes.length; // 1
int get length;
© 2012 the Dart project authors
Licensed under the Creative Commons Attribution-ShareAlike License v4.0.
https://api.dartlang.org/stable/2.0.0/dart-core/String/length.html