How to exit the JavaScript function

by Sai gowtham1min read

In this tutorial, we will learn about how to exit the function in JavaScript.

Sometimes we need to exit the middle of functions in that cases there is a return keyword in JavaScript which helps us to stop the running function.

The return keyword exits the function by returning undefined.

Example:

function add(a,b){

// if a and b is empty then only we exited the function
//by returning undefined

    if(!a && !b ){
        return
    }

   return a+b
}


console.log(add(1,3)) // 4

console.log(add()) // undefined

In the add function we first check, if a and b parameters don’t get any values then only we exited the function by using return keyword otherwise we add the a and b.

Note: Any code you add after the return keyword doesn’t execute.

function something(arr){

  return arr;

  // any code you add after the return keyword doesn't execute.

}