[FEATURE]: Add Harshad numbers #1802

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1. ridge-kimani

   changed the title [-][FEATURE]:[/-] [+][FEATURE]: Add Harshad numbers[/+] on Sep 24, 2025
2. Randomlyclueless commented on Oct 25, 2025

   

   Randomlyclueless

   on Oct 25, 2025

   More actions

   Hi! I noticed that the previous PR (#1801) was closed without merging. I’d love to take up this issue and implement the Harshad number checker for Hacktoberfest 2025. Could you please assign it to me?
3. Randomlyclueless

   added a commit that references this issue on Oct 26, 2025

   feat: add Harshad number algorithm and tests (fixes: TheAlgorithms#1802)

   ...

   This issue will close once commit 5247a1d is merged into the 'master' branch.

   5247a1d
4. Randomlyclueless commented on Oct 26, 2025

   

   Randomlyclueless

   on Oct 26, 2025

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   I have worked on the Harshad number checker and created a pull request with the implementation and tests. Please consider my contribution for this issue.
5. sharaddh commented on Jun 5, 2026

   

   sharaddh

   on Jun 5, 2026

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   function isHarshad(num) {
   if (num <= 0) return false; // Harshad numbers are typically positive integers

   // Convert number to string to iterate over digits, then sum them
   const sumOfDigits = String(num)
       .split('')
       .reduce((sum, digit) => sum + parseInt(digit, 10), 0);
   
   // Check divisibility
   return num % sumOfDigits === 0;
   

   }

   // Test cases
   console.log(isHarshad(18)); // true
   console.log(isHarshad(19)); // false
   console.log(isHarshad(1)); // true
   console.log(isHarshad(10)); // true
   console.log(isHarshad(12)); // true (1+2=3, 12/3=4)