Kadane's Algorithm

[rogerdemello]

Describe your change:

• Add an algorithm?
• Fix a bug or typo in an existing algorithm?
• Add or change doctests? -- Note: Please avoid changing both code and tests in a single pull request.
• Documentation change?

Checklist:

• [ x] I have read CONTRIBUTING.md.
• [ x] This pull request is all my own work -- I have not plagiarized.
• [ x] I know that pull requests will not be merged if they fail the automated tests.
• [ x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms.
• [ x] All new Python files are placed inside an existing directory.
• [ x] All filenames are in all lowercase characters with no spaces or dashes.
• [ x] All functions and variable names follow Python naming conventions.
• [ x] All function parameters and return values are annotated with Python type hints.
• [ x] All functions have doctests that pass the automated testing.
• [ x] All new algorithms include at least one URL that points to Wikipedia or another similar explanation.
• [ x] If this pull request resolves one or more open issues then the description above includes the issue number(s) with a closing keyword: "Fixes #ISSUE-NUMBER".

[algorithms-keeper]

Click here to look at the relevant links ⬇️

🔗 Relevant Links

Repository:

• Contributing guidelines
• Project Euler solution guidelines

Python:

• Formatted string literals (f-strings)
• Type hints
• doctest
• unittest
• pytest

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[algorithms-keeper]

Variable and function names should follow the snake_case naming convention. Please update the following name accordingly: maximumSubarraySum

As there is no test file in this pull request nor any test function or class in the file data_structures/arrays/KadaneAlgo.py, please provide doctest for the function maximumSubarraySum

Please provide return type hint for the function: maximumSubarraySum. If the function does not return a value, please provide the type hint as: def function() -> None:

Please provide type hint for the parameter: arr

[algorithms-keeper]

Variable and function names should follow the snake_case naming convention. Please update the following name accordingly: maxSum

[algorithms-keeper]

Variable and function names should follow the snake_case naming convention. Please update the following name accordingly: currSum

[algorithms-keeper]

Variable and function names should follow the snake_case naming convention. Please update the following name accordingly: currSum

[algorithms-keeper]

Variable and function names should follow the snake_case naming convention. Please update the following name accordingly: maxSum

[algorithms-keeper]

Variable and function names should follow the snake_case naming convention. Please update the following name accordingly: currSum

[imSanko]

Try running pre-commit before Submitting an PR

[cclauss]

https://github.com/TheAlgorithms/Python/blob/master/dynamic_programming/max_subarray_sum.py is done following CONTRIBUTING.md.