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Regular Expression Part 1 : Introduction

Swarnali Roy
I am a Junior Software Engineer. Learning new things and sharing those with fellow developers.
・Updated on ・1 min read

Hello readers!
In this blog , I am going to write about JavaSript Regular Expressions, also commonly known as REGEX. This is the first part of this series.

Let's get introduced with Regular Expressions πŸ“–

REGEX is an object that describes a certain pattern of characters which is used to perform pattern-matching , find, search and replace functions on text or strings. It is also very important when we want to validate emails, usernames or passwords.

Basic Syntax

The basic syntax of a regex is : /pattern/

A very simple example of searching a regex in a string is, you simply have to write your desired pattern inside the / /.

let testStr = "Search the word regex in this string";
let testRegEx = /regex/;
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In this introduction part, I want to leave it just to the basic syntax. In the next part, we will learn how to search a regex within a string.

Discussion (1)

yoshida profile image
Masao Yoshida • Edited

I hope for your next blog.