How do you use data types in JavaScript with an example?

In JavaScript, data types are essential for defining the kind of data that can be stored and manipulated within a program. JavaScript supports several data types, each serving different purposes. The primary data types in JavaScript include:

String: A sequence of characters used for text.
Number: Represents both integer and floating-point numbers.
Boolean: Holds either true or false values.
Object: A collection of properties and values.
Array: A special type of object used to store ordered collections.
Undefined: Indicates a variable that has been declared but has not yet been assigned a value.
Null: Represents a deliberate non-value or empty variable.

Here’s a simple example demonstrating various data types in JavaScript:


        // Example of different data types in JavaScript
        let name = "John Doe";           // String
        let age = 25;                    // Number
        let isEmployed = true;           // Boolean
        let address = {                  // Object
            street: "123 Main St",
            city: "Anytown"
        };
        let hobbies = ["reading", "traveling", "swimming"]; // Array
        let notDefined;                  // Undefined
        let emptyValue = null;           // Null

        console.log(name);               // Output: John Doe
        console.log(age);                // Output: 25
        console.log(isEmployed);         // Output: true
        console.log(address);            // Output: { street: '123 Main St', city: 'Anytown' }
        console.log(hobbies);            // Output: [ 'reading', 'traveling', 'swimming' ]
        console.log(notDefined);         // Output: undefined
        console.log(emptyValue);         // Output: null

How do you use data types in JavaScript with an example?

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How do you use data types in JavaScript with an example?

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