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 number `testVariable` and returns the square of the number. Try using the following mathematical identity to solve this problem. 
$(n-1)^2 = n^2 - 2n + 1$.

> Remember to implement your solution *recursively*.

### Input
A variable `testVariable` that contains the input number

### Output
The square of the input number

### Sample Input
```javascript
5
```

### Sample Output
```javascript
25
```
### Try it Yourself
Try this challenge yourself before examining the solution. Good luck!

# Problem Statement
Implement a function that takes a number `testVariable` and returns the square of the number. Try using the following mathematical identity to solve this problem. 
$(n-1)^2 = n^2 - 2n + 1$.

> Remember to implement your solution *recursively*.

## Input
A variable `testVariable` that contains the input number

## Output
The square of the input number

## Sample Input
```javascript
5
```

## Sample Output
```javascript
25
```
## Try it Yourself
Try this challenge yourself before examining the solution. Good luck!

Given a number, implement a function to compute its square.

Recursion Fundamentals

Iteration Vs Recursion

Recursion with Numbers

Recursion with Strings

Recursion with Arrays

Recursion with Data Structures

Conclusion

Challenge 1: Compute the Square of a Number

Problem Statement

Input

Output

Sample Input

Sample Output

Try it Yourself