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What is struct C# ?

  • In C#, classes and structs are blueprints that are used to create instance of a class.
  • Structs are used for lightweight objects such as Color, Rectangle, Point etc.
  • Unlike class, structs in C# are value type than reference type.
  • It is useful if you have data that is not intended to be modified after creation of struct.
Struct

Struct

C# Struct Example

  • Let's see a simple example of struct Rectangle which has two data members width and height.
using System;  

public struct Rectangle  
{  
    public int width, height;  
  
 }  
public class TestStructs  
{  
    public static void Main()  
    {  
        Rectangle r = new Rectangle();  
        r.width = 4;  
        r.height = 5;  
        Console.WriteLine("Area of Rectangle is: " + (r.width * r.height));  
    }  
}
click below button to copy the code. By - c# tutorial - team

C# examples - Output :

Area of Rectangle is: 20

C# Struct Example: Using Constructor and Method

  • Let's see another example of struct where we are using constructor to initialize data and method to calculate area of rectangle.
using System;  
public struct Rectangle  
{  
    public int width, height;  
  
    public Rectangle(int w, int h)  
    {  
        width = w;  
        height = h;  
    }  
    public void areaOfRectangle() {   
     Console.WriteLine("Area of Rectangle is: "+(width*height)); }  
    }  
public class TestStructs  
{  
    public static void Main()  
    {  
        Rectangle r = new Rectangle(5, 6);  
        r.areaOfRectangle();  
    }  
}
click below button to copy the code. By - c# tutorial - team

C# examples - Output :

Area of Rectangle is: 30
  • Note: Struct doesn't support inheritance. But it can implement interfaces.


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