Modifying Array Data Using Indexes in JavaScript

An array is a data structure used to store multiple values in a single variable. You can create an array by listing the values at the time of declaration. If you need to change a value in the array after it has been declared, JavaScript provides an easy way to do so using indexes. Here's how you can modify array data using indexes:

// Declare an array with initial values
var arrayName = [1, 2, 3, 4, 5];

// Change the first element (index 0) of the array
arrayName[0] = 'geekgokul';

// Log the updated array to the console
console.log(arrayName);

In the example above:

• We initially declare an array arrayName with the values [1, 2, 3, 4, 5].
• We then change the first element (at index 0) from 1 to 'geekgokul'.
• Finally, we log the updated array to the console, which now looks like ['geekgokul', 2, 3, 4, 5].
• By accessing the array element using its index and assigning a new value, you can easily modify any element in the array.