get hight of screen in flutter code example

Example 1: how to get screen size in flutter

double width = MediaQuery. of(context). size. width;
double height = MediaQuery. of(context). size. height;

Example 2: how to get the display size of mobile display in flutter

getHeightWidth(context){
 
    double width = MediaQuery.of(context).size.width;
 
    double height = MediaQuery.of(context).size.height;
 
    setState(() {
     heightHolder = height.roundToDouble();
     widthHolder = width.roundToDouble() ; 
    });
 
  }