Refactor getAbsValue method to use Math.abs

[MuhammadMuneebMubashar]

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• This pull request is all my own work -- I have not plagiarized it.
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[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 79.31%. Comparing base (0c79d33) to head (c1e65c2).

Additional details and impacted files

@@            Coverage Diff            @@
##             master    #7266   +/-   ##
=========================================
  Coverage     79.31%   79.31%           
+ Complexity     6990     6989    -1     
=========================================
  Files           781      781           
  Lines         22958    22958           
  Branches       4510     4510           
=========================================
  Hits          18210    18210           
  Misses         4020     4020           
  Partials        728      728           

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