Class Methods

Just like structs, classes can also have methods. The syntax for creating and calling methods is also very similar:

For example, we can create a class called Rectangle with width and height attributes and a method called area, which calculates the area of the rectangle object based on the width and height values:

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class className {
    // ... other class code

    public returnType methodName(datatype param1, datatype param2, ...) {
        // code
    }
}

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using System;

public class ConsoleApp
{
    class Rectangle {
        public double width;
        public double height;
        
        public double area() {
            return width * height;
        }
    }
    
    public static void Main(string[] args)
    {
        Rectangle r1 = new Rectangle();
        r1.width = 10;
        r1.height = 20;
        
        Rectangle r2 = new Rectangle();
        r2.width = 14.7;
        r2.height= 17.9;
        
        Console.WriteLine($"Area of R1 is {r1.area()}");
        Console.WriteLine($"Area of R2 is {r2.area()}");
    }
}

Everything was clear?

Section 3. Chapter 7