How to Use a Ternary Operator with Multiple Condition In Flutter?

Hello Flutter Folks !!! Hope you guys are enjoying our article based on various topic. In today’s article, we will discuss how to use a ternary operator with multiple conditions in flutter?

Steps to use a Ternary Operator in Flutter App with Multiple Condition?

If you’re referring to else if statements in the dart, then this ternary operator:

(foo==1)? something1():(foo==2)? something2():(foo==3)? something3(): something4();        

is equivalent to this:

if(foo == 1){
    something1();
}
elseif(foo == 2){
    something2();
}
elseif(foo == 3){
    something3();
}
else something4();        

For three condition user can

value: (i == 1) ? 1 : (i == 2) ? 2 : 0        

It is easy,

if(foo == 1 || foo == 2)
 {
  do something
  }
 {
  else do something
  }        

It can be written thus for an?OR?statement.

foo==1 || foo==2 ? do something : else do something        

It can be written thus for?AND?statement

foo==1 && foo==2 ? do something : else do something        

Both will work perfectly.

Example

class OperatorExample extends StatefulWidget {
  const OperatorExample({Key? key}) : super(key: key);
  @override
  State createState() => _OperatorExampleState();
}

class _OperatorExampleState extends State {
  int x = 20;
  int y = 30;
  int z = 10;

  @override
  Widget build(BuildContext context) {
    return Scaffold(
        appBar: AppBar(
          title: const Text("Ternary with multiple condition"),
        ),
        body: Center(
            child: Column(
                mainAxisAlignment: MainAxisAlignment.center,
                children: [
              Container(
                  margin: const EdgeInsets.fromLTRB(20, 0, 20, 0),
                  child: RaisedButton(
                    onPressed: () {
                      (x >= y && x >= z)
                          ? Fluttertoast.showToast(
                              msg: "A is Big",
                            )
                          : (y >= x && y >= z)
                              ? Fluttertoast.showToast(
                                  msg: "B is Big",
                                )
                              : Fluttertoast.showToast(
                                  msg: "C is Big",
                                );
                    },
                    child: const Text('check max number'),
                    textColor: Colors.white,
                    color: Colors.blue,
                  )),
            ])));
  }
}        

Output:

Conclusion:

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In this article, we have a walk through using a Ternary Operator with Multiple Condition in flutter?

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