Problem when try to convert double in string with toString()

Question

I have a problem when I want to display a double value in flutter. I use Text widget and I need to transform my double 0.00 in a string to display it in the widget Text. The problem is it returns "null". I want to display "BALANCE: 0.00 €", I have the 0.00 stored in double var but I can't display the value with Text Widget. Here is my code :

 Container(
                child: Text(
                "BALANCE: "+globals.balance.toString()+" €",
                style: TextStyle(
                    fontSize: 15.0,
                    fontWeight: FontWeight.w500,
                    color: Colors.white),
               ),
          ),

Result is : BALANCE : null €

Does this answer your question? [How do you round a double in Dart to a given degree of precision AFTER the decimal point?](https://stackoverflow.com/questions/28419255/how-do-you-round-a-double-in-dart-to-a-given-degree-of-precision-after-the-decim) — Tokenyet, Apr 14 '20 at 04:51

score 0 · Answer 1 · answered Apr 14 '20 at 05:13

0

you can check if null and convert it to 0 like this:

"BALANCE : "+(globals.balance??0).toStringAsFixed(2)+" €",

answered Apr 14 '20 at 05:13

Zvi Karp

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Your "??" after globals.balance it is like if global.balance==null then 0 ??? – axis-medias Apr 14 '20 at 16:32
Yes, "??" is a null check operator. – encubos Apr 14 '20 at 16:40

Problem when try to convert double in string with toString()

1 Answers1