freeCodeCamp/guide/english/certifications/javascript-algorithms-and-data-structures/es6/write-arrow-functions-with-parameters/index.md

title
Write Arrow Functions with Parameters

Write Arrow Functions with Parameters

Here is a cool resource about anonymous functions in JavaScript, in case you are still wondering what they are, and their role.

Now, you are tasked at putting parameters inside arrow functions.

Hint 1:

Get rid of the function keyword. Put the arrow operator.

Hint 2:

Make sure you changed the var to a const.

Spoiler Warning - Solution Ahead!

Solution:

const myConcat = (arr1, arr2) => {
  "use strict";
  return arr1.concat(arr2);
};
// test your code
console.log(myConcat([1, 2], [3, 4, 5]));