Learn essential coding patterns to answer problems and prepare for tech companies' interviews.

Ace the JavaScript Coding Interview

This module teaches us the underlying patterns behind common coding interview questions. By learning these essential patterns, we'll be able to unpack and answer any problem the right way—just by assessing the problem statement. This approach was created by FAANG hiring managers to help us prepare for the typical rounds of interviews at major tech companies like Apple, Google, Meta, Microsoft, and Amazon.

By the end of this module, we'll have the skills we need to unlock even the most challenging questions, grok the coding interview, and level up our career with confidence.

Coding Interview Patterns

# Statement

Write an algorithm to determine if a number $n$ is a happy number.

We use the following process to check if a given number is a happy number:

- Starting with the given number $n$, replace the number with the sum of the squares of its digits.
- Repeat the process until:
  - The number equals $1$, which will depict that the given number $n$ is a happy number.
  - The number enters a cycle, which will depict that the given number $n$ is not a happy number.

Return TRUE if $n$ is a happy number, and FALSE if not.

**Constraints**

- $1 \leq$ $n$ $\leq 2^{31} - 1$



Happy Number

Statement