🎯 Description

This PR addressesIssue#618: Add Examples by adding comprehensive, runnable JavaScript code examples for the 33 JavaScript concepts.

✨ What's Included

Code Examples (13 files)

• ✅01-call-stack.js - Call stack mechanics and LIFO behavior
• ✅02-primitive-types.js - All 7 primitive types with examples
• ✅03-value-vs-reference.js - Value vs reference type behavior
• ✅04-type-coercion.js - Type coercion and duck typing patterns
• ✅05-equality-comparison.js - == vs === vs typeof operators
• ✅06-scope.js - Function, block, and lexical scope
• ✅07-expression-vs-statement.js - Expressions vs statements
• ✅08-iife-modules.js - IIFE and module patterns
• ✅09-event-loop.js - Event loop and message queue
• ✅10-timers.js - setTimeout, setInterval, debounce, throttle
• ✅21-closures.js - Closure patterns and private variables
• ✅25-promises.js - Promise patterns and chaining
• ✅26-async-await.js - Async/await patterns

Documentation (4 files)

• ✅examples/README.md - Overview and usage instructions
• ✅examples/CONTRIBUTING_EXAMPLES.md - Contribution guidelines
• ✅examples/QUICK_START.md - Beginner's quick start guide
• ✅HACKTOBERFEST_CONTRIBUTION.md - Contribution summary

📊 Statistics

• 130+ practical examples covering 13 JavaScript concepts
• 2,500+ lines of clean, executable code
• Zero dependencies - all examples run with Node.js
• Well-structured - progressive complexity from basic to advanced

🎓 Educational Value

These examples help developers:

• Learn by doing with practical, runnable code
• Understand concepts through progressive examples
• Master fundamentals with clear, concise demonstrations
• Build confidence with tested, working code

🧪 Testing

All examples have been tested with:

• ✅ Node.js v18+
• ✅ No syntax errors
• ✅ No runtime errors
• ✅ Clear, informative output

How to Test

# Test individual examplenode examples/01-call-stack.js# Test all examplesforfilein examples/*.js;do node"$file";done