Printing values of a String List in flutter without invoking the null error

Question

I have this list

List? mcq;

Now, when after adding values in it, when I try to print the values on the app screen using the Text widget it gives a null error.

child: TextButton(
    child: Text(mcq?[0]),
    onPressed: () => {}),

It says type 'Null' is not a subtype of type 'String'.

If I remove the ? it says [] cannot be unconditionally invoked because the receiver can be null.

Then how do I print the values of a list using Text widget?

eamirho3ein · Accepted Answer · 2022-10-15 12:49:16Z

1

You need set a default value incase it get null, like this:

child: TextButton(
    child: Text(mcq?[0]?? "some thing"),//<---- add this
    onPressed: () => {}),

answered Oct 15, 2022 at 12:49

eamirho3ein

18.1k2 gold badges17 silver badges29 bronze badges

Sign up to request clarification or add additional context in comments.

1 Answer 1