Feature Request: Add exponentiation functionality to calculator

[stargazer4]

Background: We have a viable calculator that does a fabulous job of performing mathemtical operations. However, users have noted there is no way to raise a number to the power of another number, a common use case requested by many users.

Request:

Tasks

Beta Give feedback

1. Add logic for exponentiation function in calculator #13
   +0
2. Add an 'exponent' button to calculator
3. Test functionality

Examples:

• 2^2 = 4
• 3^2 = 9
• 4^4 = 256