> For the complete documentation index, see [llms.txt](https://lex47.gitbook.io/leetcode/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://lex47.gitbook.io/leetcode/leet-solution-ruby/66.md).

# 66. Plus One

Given a **non-empty** array of digits representing a non-negative integer, increment one to the integer.

The digits are stored such that the most significant digit is at the head of the list, and each element in the array contains a single digit.

You may assume the integer does not contain any leading zero, except the number 0 itself.

**Example 1:**

```
Input: digits = [1,2,3]
Output: [1,2,4]
Explanation: The array represents the integer 123.
```

**Example 2:**

```
Input: digits = [4,3,2,1]
Output: [4,3,2,2]
Explanation: The array represents the integer 4321.
```

**Example 3:**

```
Input: digits = [0]
Output: [1]
```

**Constraints:**

* `1 <= digits.length <= 100`
* `0 <= digits[i] <= 9`

```
# @param {Integer[]} digits
# @return {Integer[]}
def plus_one(digits)
  new_int = digits.join('').to_i
  new_int += 1
  digits = new_int.to_s.split('').map(&:to_i)
  p digits
  
end
```


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter:

```
GET https://lex47.gitbook.io/leetcode/leet-solution-ruby/66.md?ask=<question>&goal=<endgoal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal.

The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.