Method call in Dart

In Dart, you can call a method in a class by creating an object of that class and using that object to call the method.

Here's an example of a simple class with a method:

class Rectangle {
  int width;
  int height;
  
  Rectangle(this.width, this.height);
  
  int calculateArea() {
    return width * height;
  }
}

To call the calculateArea() method of this class, you first need to create an object of the Rectangle class:

Rectangle myRectangle = Rectangle(5, 3);

This creates a new instance of the Rectangle class and sets the width to 5 and the height to 3.

Now you can call the calculateArea() method using the object you just created:

int area = myRectangle.calculateArea();

This will call the calculateArea() method on the myRectangle object and return the area (which in this case is 15).

You can also call the method directly on the object using the dot notation:

int area = myRectangle.calculateArea;

Both of these methods will give you the same result.