abs abstract method
int abs(Returns the absolute value of this integer.
For any integer x, the result is the same as x < 0 ? -x : x.
Source
int abs();© 2012 the Dart project authors
Licensed under the Creative Commons Attribution-ShareAlike License v4.0.
https://api.dartlang.org/stable/1.24.3/dart-core/int/abs.html