arrow functions are shorter syntax instead of using conventional way to write function. 
eg -
<code>const sum = (a,b) =&gt; { return a+b; }</code>
<code>console.log(sum(5,6));</code>
To make it even more shorter -&gt;
<code>const sum = (a,b) =&gt; a+b;</code>
<code>console.log(sum(5,7));</code>
So if the arrow function is returning only one value then no need to write return or curly braces.
<ul>
<li>arrow function doesn't have it's own this.
 it always refers to the global or window reference.
</li>
</ul>

arrow functions are shorter syntax instead of using conventional way to write function.  
  
eg -

`const sum = (a,b) => { return a+b; }`

`console.log(sum(5,6));`

To make it even more shorter -&gt;

`const sum = (a,b) => a+b;`

`console.log(sum(5,7));`

So if the arrow function is returning only one value then no need to write return or curly braces.

* arrow function doesn't have it's own this.
    
    it always refers to the global or window reference.