? JavaScript Strings

Strings in JavaScript represent sequences of characters used to store and manipulate text.

What is a String?

• A string is a sequence of characters enclosed in single quotes (''), double quotes (""), or backticks (``).

• Examples:

let str1 = "Hello, world!";let str2 = 'JavaScript is fun.';let str3 = `Template literals allow embedding variables.`;

Key Characteristics

• Strings are immutable — once created, they cannot be changed (but you can create new strings from existing ones).

• Strings have a length property indicating the number of characters.

console.log(str1.length); // 13

Creating Strings

let singleQuote = 'Hello';let doubleQuote = "World";let backtick = `Hello World`;

Common String Operations

• Concatenation:

let greeting = "Hello, " + "World!"; // "Hello, World!"

• Template literals:

let name = "Alice";let message = `Hello, ${name}!`; // "Hello, Alice!"

• Access characters:

console.log(str1[0]); // 'H'

• Escape characters:

let quote = "He said, \"JavaScript is awesome!\"";

String Methods

JavaScript provides many methods to work with strings, like:

• toUpperCase()

• toLowerCase()

• indexOf()

• slice()

• split()

• replace()

• trim()

• ...and many more!

Example:

let text = "  JavaScript is great!  ";console.log(text.length);             // 22console.log(text.trim());             // "JavaScript is great!"console.log(text.toUpperCase());     // "  JAVASCRIPT IS GREAT!  "console.log(text.indexOf("is"));     // 11console.log(text.slice(2, 12));      // "JavaScript"

If you want, I can help you explore specific string methods or advanced string handling!