# Case Class, Traits and Objects

Recently I started learning Scala first few concepts that learnt while modelling a domain in Scala are Case classes, traits and objects. In this blog I will try to summarize my learnings!

## Case Class
Scala being a functional + object oriented language, immutability plays very important role. Case classes are the ways to create immutable data. 

```scala
case class Shoe(size: Int)
val kidShoe = Shoe(5)
``` 

## Traits
Traits are similar to Java 8 interfaces, it can have abstract and non abstract methods. 


```
trait ShoeType
       def type: Unit
``` 

## Object
An object is a class that has exactly one instance. It is created lazily when it is referenced, like a lazy val.

```
object WearAShoe{
   val adultShoe = Shoe(10)
  def main(arg: Array[String]): Unit = println("I wear a shoe")
}
```