“JavaScript Data Types: Values and Usage”

JavaScript is a flexible programming language that can work with different data types. These data types can be stored in variables and processed. Here are the fundamental data types in JavaScript:

1. String

The string data type represents text values. A string can be defined using single quotes ('), double quotes ("), or backticks (`).

let name = 'John';
let message = "Hello, World!";
let templateString = `My name is ${name}.`;

2. Number

The number data type represents numeric values such as integers, decimals, and negative numbers.

let integer = 42;
let decimal = 3.14;
let negativeNumber = -10;

3. Boolean

The boolean data type represents only two values: true (true) and false (false).

let isTrue = true;
let isFalse = false;

4. Array

The array data type represents a collection of elements. Elements are defined within square brackets and separated by commas

let numbers = [1, 2, 3, 4, 5];
let names = ['John', 'Jane', 'Alice'];


5. Object

The object data type represents a combination of properties and values. Properties are defined as key-value pairs.

let person = {
    name: 'John',
    age: 30,
    city: 'New York'
};

6. Undefined and Null

The undefined data type indicates that a variable has not been assigned a value, whereas the null data type represents an empty value.

let undefinedVariable;
let nullValue = null;


JavaScript also provides more complex data types beyond these basics. However, these fundamental data types form the building blocks of most programs.

Conclusion

JavaScript is a flexible language with various data types, each with unique usage and properties. In this article, we examined the fundamental data types in JavaScript along with examples.