Added Exponent Finding program

[Utsav1999]

Describe your change:

This Python recursion program is for finding exponent.

• Add an algorithm?
• Fix a bug or typo in an existing algorithm?
• Documentation change?

Checklist:

• I have read CONTRIBUTING.md.
• This pull request is all my own work -- I have not plagiarized.
• I know that pull requests will not be merged if they fail the automated tests.
• This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms.
• All new Python files are placed inside an existing directory.
• All filenames are in all lowercase characters with no spaces or dashes.
• All functions and variable names follow Python naming conventions.
• All function parameters and return values are annotated with Python type hints.
• All functions have doctests that pass the automated testing.
• All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation.
• If this pull request resolves one or more open issues then the commit message contains Fixes: #{$ISSUE_NO}.

[TravisBuddy]

Hey @Utsav1999,
Something went wrong with the build.

TravisCI finished with status errored, which means the build failed because of something unrelated to the tests, such as a problem with a dependency or the build process itself.

View build log

TravisBuddy Request Identifier: 594dbd40-ceb9-11ea-84f0-41e93e5606ac

[Utsav1999]

The command "flake8 --ignore=E203,W503 --max-complexity=25 --max-line-length=88 --statistics --count ." failed and exited with 1 during .

How to resolve this?

[lance-pyles]

The issues are listed. Go to details then The build link and scroll down. Looks like formatting issues mostly.

[cclauss]

https://github.com/TheAlgorithms/Python/blob/master/Travis_CI_tests_are_failing.md

[vasugamdha]

I can help you to pass these checks but i don't know how to help and edit the code in this PR? @Utsav1999

[cclauss]

Autofix with python3 -m pip install black ; black maths/exponent_recursion.py

[cclauss]

Suggested change

	def powerCalculation(n: int, p: int)->int:
	def power(base: int, exponent: int)->int:
	"""
	>>> all(power(base, exponent) == pow(base, exponent)
	... for base in range(-10, 10) for exponent in range(10))
	True
	"""
	return base * power(base, exponent - 1) if exponent > 0 else 1

[cclauss]

Does not properly handle negative exponents.

[TravisBuddy]

Hey @Utsav1999,
Something went wrong with the build.

TravisCI finished with status errored, which means the build failed because of something unrelated to the tests, such as a problem with a dependency or the build process itself.

View build log

TravisBuddy Request Identifier: e07ea170-cf50-11ea-9502-ed86ad10d0d8