Add a new Ruby script to check if a number is odd or even, including …

[YashShah-Josh]

…input validation for integers.

[YashShah-Josh]

Code Review

Overall: Nice clean implementation! The script handles input validation well and correctly identifies odd/even numbers.

Strengths:

• Good use of regex for input validation (/^-?\d+$/)
• Handles negative numbers correctly
• Special handling for zero is thoughtful
• Clean method extraction

Suggestions:

1. Add a shebang line (#!/usr/bin/env ruby) for direct execution
2. Consider making return values consistent (currently returns descriptive string for zero, but "Even"/"Odd" for others)
3. Handle EOF case: gets&.strip can return nil on pipe/EOF
4. Add file-level documentation comment

Verdict: Approve with minor suggestions. Code is functional and well-structured.