# LeetCode: Add Strings Solution

*Add digits with carry*

## Approach

Let's take an example

1123 + 29231 2 340 2 95-----61 5 2783 + 9 = 12, takes 2, carries 192 + 2 = 4, plus carry of 1, results in 5, takes 5101 + 0 = 1, takes 11112final result is 152

## Implementation

1var addStrings = function (num1, num2) {2 const maxLength = Math.max(num1.length, num2.length)3 num1 = num1.padStart(maxLength, "0").split("").reverse()4 num2 = num2.padStart(maxLength, "0").split("").reverse()56 const res = []7 let carry = 089 for (let i = 0; i < maxLength; i++) {10 const digitSum = Number(num1[i]) + Number(num2[i]) + carry11 res.push(digitSum % 10)12 carry = Math.floor(digitSum / 10)13 }1415 // in case we have carry leftover16 carry && res.push(carry)1718 return res.reverse().join("")19}

## References

## Comments

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## Tags

leetcode

string

math

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