Regular Expression Tutorial – Learn Regex with Phone Number Validation Example
📞 Regular Expression Tutorial – Learn Regex with Phone Number Validation Example
In this step-by-step regex tutorial, you’ll learn how to create regex patterns and validate phone numbers with real regex examples. This regular expressions tutorial is perfect for beginners who want to learn regex using live testing with regex101 and apply it in JavaScript and Python. Whether you're looking to write regex from scratch, understand regex basics, or build a regex phone number validator, this video has you covered.
Covered topics include:
✅ Regex phone number validation
✅ Using \d, [], (), +, ? and anchors (^, $)
✅ Regex in JavaScript and Python
✅ How to write a regular expression from scratch
✅ How to create a phone number regex
✅ Regex for different formats:
123-456-7890
(123) 456 7890
123.456.7890
+1 123 456 7890
+44 123 456 7890
Whether you're building a regex phone number validator, learning regex for beginners, or just need a JavaScript regex tutorial, this video is for you.
🎓 What You’ll Learn:
What is regex? (regular expressions explained for beginners)
How to build a regex pattern for phone numbers
How to use regex101.com for live testing
How to write regex step by step
Using regex in Python and JavaScript for validation
Regex basics like \d, [], ?, +, (), ^, $
Best practices for writing language-agnostic regex
👤 Who This Is For:
Beginners searching “regex for beginners” or “learn regex with example”
Developers needing a regex phone number tutorial
Anyone trying to validate phone numbers using regex in Python, JavaScript, PHP, or Java
Chapters:
00:00 Introduction
00:26 What is regex? (What is regular expressions)
01:11 Intro to regex101 website
01:53 \d - Regex building blocks
03:26 Character classes [ ] - Regex building blocks
05:49 + - Regex building blocks
06:24(? - Regex building blocks
09:58 Assembling phone number regex
16:15 Testing regex in python
17:10 Testing regex in JavaScript
Regular expression playlist: • Learn Regex from Scratch – Full Beginner t...
Article version (with code): https://medium.com/@a1guy/learn-regex...
🧪 Test Your Regex Live
Use regex101.com to follow along interactively and see matches in real time!
📌 Drop a comment below if you'd like a regex tutorial for emails, passwords, or custom formats next!
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