Description:

This pull request adds the gray_code(n) function and corresponding unit tests to generate and verify n-bit Gray code sequences. Gray code is a numeral system used in digital systems where two successive values differ by only one bit.

Key Features:

• Gray Code Generator:

  • The function recursively generates Gray codes for any n-bit length by building on previous sequences and mirroring them.
  • Returns Gray code in decimal representation.

• Comprehensive Unit Tests:

  • A set of unit tests is included to validate the correctness of the Gray code generator for various bit lengths.
  • Tests for 0-bit, 1-bit, 2-bit, 3-bit, and 4-bit Gray code sequences, ensuring accuracy of the output.

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