If you’ve ever struggled with solving coding problems using recursion, or if you need to brush up your recursion skills for an interview, this course is for you! We will start with the basics of recursion before we practice solving actual coding problems. 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 of recursion to solve complex, real-world problems. We hope that this course will help you ace all the recursion related questions during interviews at top tech companies!

Recursion for Coding Interviews in Python

## Problem Statement
Implement a function that takes a specific number `testVariable` and returns the square of the number.

>Use 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
```python
5
```

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

# Problem Statement
Implement a function that takes a specific number `testVariable` and returns the square of the number.

>Use 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
```python
5
```

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

Given a number, implement a function to compute the square of that number.


Recursion Fundamentals

Iteration Vs. Recursion

Recursion with Numbers

Recursion with Strings

Recursion with Arrays

Recursion with Data Structures

Conclusion

Challenge 1: Compute Square of a Number

Problem Statement

Input

Output

Sample Input

Sample Output

Try it Yourself!