How to add space in one row (Flutter)?

Question

I'm a beginner. I have one row and 2 buttons in it. I want to add space between them, for example padding, margin, container or something. I tried a lot of solutions from other questions, but nothing works for me.

My code:

   Row(
      children: <Widget>[
        Expanded(
            child: ElevatedButton(
          onPressed: () {},
          child: Text("Scan"),
        )),
        Expanded(
            child: ElevatedButton(
          onPressed: () {},
          child: Text("Manually"),
        )),
      ],
    );

Answer 1

You can add padding around the button on which you want to give space

Row(
            children: <Widget>[
              Expanded(
                  child: ElevatedButton(
                onPressed: () {},
                child: Text("Scan"),
              )),
              SizedBox(
                width: 100,
              ),
              Expanded(
                  child: Padding(
                    padding: const EdgeInsets.only(left:8.0),
                    child: ElevatedButton(
                onPressed: () {},
                child: Text("Manually"),
              ),
                  )),
            ],
          ),