https://leetcode.com/problems/closest-prime-numbers-in-range
- create a helper function for checking if a number is prime
- create variable that will contain the min diff (starts with max int)
- create a variable that will contain the no result pair
- create a variable that will contain the prev prime number, will start with infinity
- run through the range
- if not prime, continue
- get the absulute diff between the current number and the prev prime number
- compare with the min diff, if bigger continue
- update the min diff
- update the pair
- if diff is smaller than 2, return the pair early
- update prev to current
- return the pair you found