Plus One - Challenge

Plus One

Easy

Problem

You are given a large integer represented as an array of digits digits, ordered most significant to least significant. The number has no leading 0 unless it is exactly zero. Increment the integer by one and return the resulting array of digits.

Constraints

• 1 <= digits.length <= 100
• 0 <= digits[i] <= 9
• digits has no leading 0 unless digits.length == 1 and digits[0] == 0

Sample Tests

Test 1

Input

digits = [1, 2, 3]

Expected

[1, 2, 4]

123 + 1 = 124

Test 2

Input

digits = [9]

Expected

[1, 0]

Carry creates a new most significant digit.

Test 3

Input

digits = [9, 9, 9]

Expected

[1, 0, 0, 0]

Cascading carry across all digits.

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Console

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