2.2 numintdoubleStringboolListSetMap

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2.2 numintdoubleStringboolListSetMap 2.2 numintdoubleStringboolListSetMap DartBuilt-in TypesDartDart—— Dart—— —— numint double Dart Dart VM arbitrary-precision integer Java Python 3264 JavaScript Dart JS Dart JavaScript IEEE 754 $-2^{53} + 1$ $2^{53} - 1$ IEEE 754 Dart 8/ 1Dart “”Dart“”—— Unicode DartimmutableUnicodeDart DartUnicode UTF-16code