I tried double.parse to get the data of TextFormField as a double:
double _pointsUsing = double.parse(pointsEdditingController.text);
but it causes error saying "The method '>=' was called on null". If I tried this:
double _pointsUsing = double.tryParse(pointsEdditingController.text);
it returns null.
The textformfield text value is: 1,133.00
It also says "Tried calling: <(1133.0) 1,133.00"
you need to remove "," from the string then after parse to double.
double _pointsUsing = double.parse(pointsEdditingController.text.replaceAll(",",""));