 # Plus One Large Integer

Easy
5
64.0% Acceptance

In this lab, you are tasked with manipulating a large integer represented as an integer array `digits`, where each `digits[i]` is the `ith` digit of the integer. The digits are ordered from most significant to least significant in left-to-right order. The large integer does not contain any leading `0`'s.

Your goal is to increment the large integer by one and return the resulting array of digits.

## Example

### Example 1:

Input: digits = [1,2,3] Output: [1,2,4] Explanation: The array represents the integer 123. Incrementing by one gives 123 + 1 = 124. Thus, the result should be [1,2,4].

### Example 2:

Input: digits = [4,3,2,1] Output: [4,3,2,2] Explanation: The array represents the integer 4321. Incrementing by one gives 4321 + 1 = 4322. Thus, the result should be [4,3,2,2].

### Example 3:

Input: digits =  Output: [1,0] Explanation: The array represents the integer 9. Incrementing by one gives 9 + 1 = 10. Thus, the result should be [1,0].

## Constraints:

• `1 <= digits.length <= 100`
• `0 <= digits[i] <= 9`
• `digits` does not contain any leading `0`'s.

## Challenges

1. Write the function `plusOne(digits)` that increments the given integer array by one and returns the resulting array of digits.
2. Export the function `plusOne(digits)` properly so that it can be used in the evaluation script.
3. Write test cases for your implementation to ensure its correctness.