Handle negative input in perfect square checks

[asmitha-16]

This PR improves the perfect square validation by:

• Returning false for negative input values
• Preventing invalid calculations in Math.sqrt and Math.pow

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 79.00%. Comparing base (1644db2) to head (b8b18e2).

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #7207      +/-   ##
============================================
+ Coverage     78.99%   79.00%   +0.01%     
- Complexity     6913     6915       +2     
============================================
  Files           776      776              
  Lines         22843    22847       +4     
  Branches       4488     4488              
============================================
+ Hits          18045    18051       +6     
+ Misses         4077     4076       -1     
+ Partials        721      720       -1     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.