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

## What does "Power of a Number" mean?
The **power** (or **exponent**) $a$, of a number $x$, represents the number of times $x$ needs to be multiplied by itself. 

> $x$ to the power $a$ is the product of $x$ with itself $a$ times!

It's written as a small number to the right and above the *base* number.

For example, if the base number is $2$ and the exponent value is $3$, we represent this as follows:

$2^3 = 8$
​

The following illustration explains the concept:


# What does "Power of a Number" mean?
The **power** (or **exponent**) $a$, of a number $x$, represents the number of times $x$ needs to be multiplied by itself. 

> $x$ to the power $a$ is the product of $x$ with itself $a$ times!

It's written as a small number to the right and above the *base* number.

For example, if the base number is $2$ and the exponent value is $3$, we represent this as follows:

$2^3 = 8$
​

The following illustration explains the concept:


In this lesson, we'll learn how to find the power of a number using recursion.

Recursion Fundamentals

Iteration Vs Recursion

Recursion with Numbers

Recursion with Strings

Recursion with Arrays

Recursion with Data Structures

Conclusion

Power of a Number

What does “Power of a Number” mean?