Reverse integer LeetCode Solution

Reverse Integer LeetCode Solution :

Given a signed 32-bit integer x, return x with its digits reversed. If reversing x causes the value to go outside the signed 32-bit integer range [-231, 231 – 1], then return 0.

  • Assume the environment does not allow you to store 64-bit integers (signed or unsigned).
Leetcode solutions

Reverse Integer LeetCode Solution :

Constraints :

  •  -231 <= x <= 231 – 1
reverse integer leetcode

Approach for Reverse Integer LeetCode Solution : :

  1. Initialize a variable ‘reverse’ to 0. This variable will hold the reversed integer.
  2. Initialize another variable ‘num’ to the given integer. We will use ‘num’ to avoid modifying the original input integer.
  3. While the ‘num’ is not equal to 0, extract the rightmost digit of ‘num’ using the modulo operator (%). Store this digit in a variable called ‘digit’.
  4. Multiply ‘reverse’ by 10 and add the extracted digit ‘digit’ to it.
  5. Divide ‘num’ by 10 and update ‘num’ with the quotient. This will remove the rightmost digit of ‘num’ in each iteration.
  6. Repeat steps 3-5 until ‘num’ becomes 0.
  7. Check if the reversed integer ‘reverse’ is within the range of a 32-bit signed integer. If it is not, return 0.
  8. Return the reversed integer ‘reverse’.

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