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Copyright (c) 2019
Author: Chaitanya Tejaswi (github.com/CRTejaswi)    License: GPL v3.0+

Day 2 - Calculator ^{[source] [video]}

A 4-function +-*/ calculator utility .

What's Next?

• Add +/- button, to alternate number between positive & negative values.
  eg. If display is 12, press +/- to get -12, and vice-versa.
• Add mod (%) calculations.
  eg. 12 % 5 = 2.
• Publish the utility as a Chrome/Firefox extension.