why 23 in between 21 and 25 is not lucky number,

as we are getting digit sum 5, and sum of square of digits are 13.

Here is my solution in java, javascript, python, C, C++, Csharp HackerRank Lucky Numbers Problem Solution

Why not work for number very long in javascript?

Here is Lucky Numbers problem solution in Python Java C++ and C programming - https://programs.programmingoneonone.com/2021/07/hackerrank-lucky-numbers-problem-soluton.html

Here is Lucky Numbers problem solution in Python Java C++ and C programming - https://programs.programmingoneonone.com/2021/07/hackerrank-lucky-numbers-problem-soluton.html