# Scala 3-Method-2

**Defining Methods**   

### Scala 3 methods may contains many types of parameters:   


Generic (type) parameters   

Default parameter     

Multiple parameter    

Context-provided parameters     

By-name parameters    

Method can be defined either with return or without return:-  


```def mulMethod(a: Int, b: Int): Int = a + b//method with return type ```   
  
```def mulMethod(a: Int, b: Int) = a + b//method without return type```   



The keyword **def** is used to define a method    

The Scala standard is to name methods using the **camel case** convention   

Method parameters are always defined with their type   

Declaring the method return type is optional   

Methods can be multi  lines, or just one line    


Here are two examples of a one-line method named add that takes two Int input parameters. The first method shows the method’s Int return type, and the second does not:


It is recommended to annotate publicly visible methods with their return type. Declaring the return type can make it easy, and readable.

**Calling methods**
#### Invoking a method is simple:     

```val p = mulMethod(5,4) ```          
   
or          

```val q = mulMethod(5,4)```     

![Scala3.png](https://cdn.hashnode.com/res/hashnode/image/upload/v1664869742189/JbSGKBOkS.png align="left")