The ultimate guide to recursion interviews with strategies developed by FAANG engineers. Practice with real-world interview questions, detailed explanations, and visualizations to prep faster.

If you’ve got an interview coming up and want to brush up on your knowledge, or if you’ve ever struggled with solving coding problems using recursion, you'll find this course helpful.
 
You’ll start with the basics of what recursion is and why it’s important before diving into what it looks like in practice. You’ll see how recursion can help you solve a variety of different math, string, and data structure problems by using interactive code playgrounds that you can execute directly in your browser. You’ll have access to detailed explanations and visualizations for each problem to help you along the way.  
 
By the time you’re done, you’ll be able to use what you’ve learned to solve complex real-world problems and even advance more easily through your interviews at top tech companies.

Recursion for Coding Interviews in Java

## What does Exponent of a Number mean?

An exponent tells you how many times the base number is used as a factor. It is written as a small number to the right of and above the base number. A base of five raised to the *second power* is called **five squared**. This means **five times five**. Five raised to the *third power* is called **five cubed**. It means **five times five times five**. The base can be any sort of number; a whole number, a decimal number, or a fraction can all be raised to a power.

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 Exponent of a Number mean?

An exponent tells you how many times the base number is used as a factor. It is written as a small number to the right of and above the base number. A base of five raised to the *second power* is called **five squared**. This means **five times five**. Five raised to the *third power* is called **five cubed**. It means **five times five times five**. The base can be any sort of number; a whole number, a decimal number, or a fraction can all be raised to a power.

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 will learn how to find the exponent of a number using recursion. 

Fundamentals of Recursion

Iteration to Recursion

Recursion with Numbers

Recursion with Strings

Recursion with Arrays

Recursion with Data Structures

The Exponent of a Number

What does Exponent of a Number mean?