Strings

Strings are used to store and work with text in JavaScript. They can contain letters, numbers, symbols, spaces, and other characters.

What is a String?

A string is a sequence of characters used to represent text in JavaScript.

Strings are written inside single quotes, double quotes, or backticks.

String Example

A string can contain a name, course name, city, message, or any other text.

Example: "JavaScript"

JavaScript String characters and indexes

A JavaScript string contains characters arranged using zero-based index positions.

Important String Concepts

String Value

Store Text

Strings are commonly used to store text values such as names and messages.

Index

Access Characters

Each character in a string has an index. The first character starts at index 0.

length

Count Characters

The length property tells us the length of a string.

Combine Strings

The plus operator can be used to combine two or more strings.

String Indexing

Characters and Their Index Positions

JavaScript uses zero-based indexing, so the first character is at index 0.

Example 1: Creating a String

We can create a string by assigning text inside quotation marks to a variable.

let course = "JavaScript";

console.log(course);

Output: JavaScript

Example 2: Accessing a Character

We can access an individual character of a string using its index position.

let course = "JavaScript";

console.log(course[0]);
console.log(course[4]);

Output: J
S

Example 3: Finding String Length

The length property returns the length of a string.

let course = "JavaScript";

console.log(course.length);

Output: 10

Example 4: Combining Strings

The + operator can be used to combine two strings.

let firstName = "CIIT";
let course = "JavaScript";

let message = firstName + " " + course;

console.log(message);

Output: CIIT JavaScript

Summary

Strings are used to represent text in JavaScript. Characters can be accessed using index positions, the length property can be used to find string length, and the + operator can be used to combine strings.