The ultimate guide to recursion interviews in JavaScript. Developed by FAANG engineers. Practice with real-world interview questions and get interview-ready in just a few hours.

If you’ve ever struggled with solving problems using recursion, or if you have to brush up your skills for an interview, this course is for you.

We'll start with the basics of what recursion is and why it’s important before diving into practicing solving actual questions. You’ll have access to detailed explanations and visualizations for each problem to help you along the way. 

By the time you have completed this course, you’ll be able to use all the concepts to solve complex real-world problems. We hope that through practicing recursion, you will be able to ace all recursion related questions in interviews at top tech companies.

Recursion for Coding Interviews in JavaScript

## Problem Statement
Implement a function that takes a stack, `testVariable`, and reverses it. Do not use any other extra stack or data structure.

Helper `Stack` class is provided in the file `stack.js`. Take a look at the file before implementing your solution. If you want to study stacks in detail, review [Interview Refresher Course on Data Structures in Javascript](https://www.educative.io/courses/data-structures-coding-interviews-javascript/what-is-a-stack).

> Write your code in the space provided in the file `index.js`.

### Input
A variable `testVariable` that contains a stack.

### Output
No explicit output. Our task is to reverse the contents of the stack.

### Sample Input
```
8, 5, 3, 2
```




# Problem Statement
Implement a function that takes a stack, `testVariable`, and reverses it. Do not use any other extra stack or data structure.

Helper `Stack` class is provided in the file `stack.js`. Take a look at the file before implementing your solution. If you want to study stacks in detail, review [Interview Refresher Course on Data Structures in Javascript](https://www.educative.io/courses/data-structures-coding-interviews-javascript/what-is-a-stack).

> Write your code in the space provided in the file `index.js`.

## Input
A variable `testVariable` that contains a stack.

## Output
No explicit output. Our task is to reverse the contents of the stack.

## Sample Input
```
8, 5, 3, 2
```




Given a stack, reverse the contents of the stack.

Recursion Fundamentals

Iteration Vs Recursion

Recursion with Numbers

Recursion with Strings

Recursion with Arrays

Recursion with Data Structures

Conclusion

Challenge 2: Reverse a Stack

Problem Statement

Input

Output

Sample Input