Dart convert import

With Dart:

How to cast a string to an integer in Dart

Encoders and decoders for converting between different data representations, including JSON and UTF-8 . In addition to converters for common data representations, this library provides support for implementing converters in a way which makes them easy to chain and to use with streams.

Use the toString() method to convert an int or double to a string. To specify the number of digits to the right of the decimal, use toStringAsFixed().