This project enable to make computations on decimal numbers without losing precision like double operations.
For instance :
// with double
print(0.2 + 0.1); // displays 0.30000000000000004
// with decimal
print(Decimal.parse('0.2') + Decimal.parse('0.1')); // displays 0.3To use this library in your code :
- add a dependency in your
pubspec.yaml:
dependencies:
decimal:- add import in your
dartcode :
import 'package:decimal/decimal.dart';- Start computing using
Decimal.parse('1.23').
Hint : To make your code shorter you can define a shortcut for Decimal.parse :
final d = (String s) => Decimal.parse(s);
d('0.2') + d('0.1'); // => 0.3You can use the intl package to format decimal
by wrapping the decimal into DecimalIntl from the package:decimal/intl.dart
library:
import 'package:decimal/decimal.dart';
import 'package:decimal/intl.dart';
main() {
var value = Decimal.parse('1234.56');
var formatter = NumberFormat.decimalPattern('en-US');
print(formatter.format(DecimalIntl(value)));
}Tip: you can define an extension to make it less verbose:
extension on Decimal {
String formatWith(NumberFormat formatter) => formatter.format(DecimalIntl(this));
}
main() {
var value = Decimal.parse('1234.56');
var formatter = NumberFormat.decimalPattern('en-US');
print(value.formatWith(formatter));
}Apache 2.0
