<h2 id="heading-coding-an-interface-in-dart">Coding an Interface in dart :</h2>
<ul>
<li>Instead, you define an interface by creating an abstract class with abstract methods
</li>
<li>Let's see how we can code an interface in Dart using an example:
</li>
</ul>
<ul>
<li><pre><code class="lang-dart"> // Define an interface for a shape
 abstract class Shape {
 // Abstract method to calculate area
 double calArea();

 // Abstract method to calculate perimeter
 double calPerimeter();
 }
</code></pre>
</li>
</ul>

## Coding an Interface in dart :

* Instead, you define an interface by creating an abstract class with abstract methods
    
* Let's see how we can code an interface in Dart using an example:
    

* ```dart
    // Define an interface for a shape
    abstract class Shape {
      // Abstract method to calculate area
      double calArea();
    
      // Abstract method to calculate perimeter
      double calPerimeter();
    }
    ```

Dart Interfaces : Coding an Interface in Dart

Coding an Interface in dart :