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

## Direct Recursion

**Direct recursion** occurs when a function calls itself.

This results in a **one-step** recursive call: the function makes a recursive call inside its own function body.

### Syntax of Direct Recursion
```javascript
function function1(p1, p2, ..., pn) {
  // Some code here
  function1(p1, p2, ..., pn);
  // Some code here
}
```

### Printing Natural Numbers from $1$ to $n$ Using Direct Recursion

Let's have a look at an example that prints natural numbers from $1$ to $n$:

# Direct Recursion

**Direct recursion** occurs when a function calls itself.

This results in a **one-step** recursive call: the function makes a recursive call inside its own function body.

## Syntax of Direct Recursion
```javascript
function function1(p1, p2, ..., pn) {
  // Some code here
  function1(p1, p2, ..., pn);
  // Some code here
}
```

## Printing Natural Numbers from $1$ to $n$ Using Direct Recursion

Let's have a look at an example that prints natural numbers from $1$ to $n$:

This lesson explains two different types of recursion: direct and indirect recursion.

Recursion Fundamentals

Iteration Vs Recursion

Recursion with Numbers

Recursion with Strings

Recursion with Arrays

Recursion with Data Structures

Conclusion

Direct vs. Indirect Recursion

Direct Recursion

Syntax of Direct Recursion

Printing Natural Numbers from $1$ to $n$ Using Direct Recursion