# JavaScript Function

# **What is a function in JavaScript?**

A function can be defined as a piece or block of code which is executed to perform a specific task.
Functions allow us to define a block of code, give it a name and then execute it as many times as we want. We can define a JavaScript function using the keyword function.  

**Let’s explore JavaScript functions in detail**

# **Function declarations**

**Syntax**

```
function name (parameter1,parameter2,..){
//block of code
}
name()

``` 
# **Parameters and Arguments**

Parameter are variables declared while defining a function where as, Arguments are variables which are passed to function definition when the function is called.

**Example:**


![par example.jfif](https://cdn.hashnode.com/res/hashnode/image/upload/v1664524945766/VAKhdbeP2.jfif align="left")