Display Your Name

// Using a variable to store and display name
let name = "John Doe";
console.log("My name is:", name);

My name is: John Doe

This program demonstrates how to use variables in JavaScript. Variables are containers that store data values.

Variable Declaration

JavaScript uses let, const, or var to declare variables:

• let: Block-scoped, can be reassigned
• const: Block-scoped, cannot be reassigned (constant)
• var: Function-scoped, older syntax (avoid in modern code)

String Variables

Strings are sequences of characters enclosed in quotes:

• Single quotes: 'Hello'
• Double quotes: "Hello"
• Template literals: Hello (ES6)

Console.log with Multiple Arguments

console.log() can take multiple arguments separated by commas. Each argument is converted to a string and displayed with a space between them.

Example:

javascript
let firstName = "John";
let lastName = "Doe";
console.log("Name:", firstName, lastName);
// Output: Name: John Doe

Variable Naming Rules:

• Must start with letter, _, or $
• Can contain letters, digits, _, $
• Case-sensitive
• Cannot use reserved keywords
• Use camelCase for multi-word names