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Accessing the Last Element of an Array
                 To access the last element of an array, you can use array.length - 1 to get the index of the last element.
                 Another modern method is to use at() which allows negative indexing.

                 For example:

                    const array = [10, 20, 30, 40, 50];
                    // Accessing the last element using array.length - 1
                    var lastElement = array[array.length - 1];
                    console.log(lastElement);  // Output: 50

                 Modifying Array Elements
                 You can modify array elements by directly assigning a new value to an index, or you can use array methods
                 to modify all or specific elements.

                 For example:

                    const array = [10, 20, 30, 40, 50];
                    // Modifying the element at index 2 (third element)
                    array[2] = 35;

                    console.log(array);  // Output: [10, 20, 35, 40, 50]
                 Example 43: To demonstrate how to modifying array elements

                    <!DOCTYPE HTML>

                    <HTML>
                    <HEAD>
                    <TITLE>Accessing Array Elements</TITLE>

                    </HEAD>
                    <BODY TEXT="red">
                    <H2>Accessing array elements</H2>
                    <FONT COLOR=BLUE>

                    <SCRIPT>
                    const cars = ["Ferrari", "WagonR", "BMW"];
                    document.write("Element 2 is " + cars[1]);
                    //element values can be changed

                    cars[2]="Porsche";
                    document.write("<br> After Change the array now is "+"<br>");
                    document.write(cars[0]+"<br>");
                    document.write(cars[1]+"<br>");

                    document.write(cars[2]+"<br>");
                    </SCRIPT>
                    </FONT>

                    </BODY>
                    </HTML>

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