📝 Variables in Rust: Simple, Safe, and Powerful

✨ Declaring Variables

• let creates a variable (immutable by default)
• mut makes it mutable (you can change it)
• You can add a type (like f64) if you want

🔄 Changing Values (Mutability)

🕵️ Shadowing: Reuse Names, Change Types

• Shadowing lets you reuse a variable name
• You can even change its type!

🧠 Best Practices

• Prefer immutability (let) unless you need to change the value
• Use clear, descriptive names
• Shadowing is great for transformations
• Type annotations are optional, but can help with clarity