Marusya's School Notes

Change Elements

Array elements are accessed using their index number. Array indexes start with 0. The first array element is [0], the second array element is [1], the third is [2] ... You can change any element, using it's index number, which you can find with indexOf:

HTML file:	Displayed by browser:
<body> <h4>Original array:</h4> <p id="demo"></p> <hr /> <h4>Find the index of Orange:</h4> <button onclick="myIndex()">Find Index</button> <p id="demo1"></p> <hr /> <h4>Swap Orange with Kiwi, using index access:</h4> <button onclick="mySwap()">Swap it</button> <p id="demo2"></p> <script> var fruits = ["Banana", "Orange", "Apple", "Mango"]; document.getElementById("demo").innerHTML = fruits; function myIndex() { document.getElementById("demo1").innerHTML = fruits.indexOf("Orange"); } function mySwap() { fruits[1] = "Kiwi"; // Swap Orange with Kiwi document.getElementById("demo2").innerHTML = fruits; } </script> </body>	Original array: Find the index of Orange: Swap Orange with Kiwi, using index access:

HTML file:

Displayed by browser:

<body>
<h4>Original array:</h4>
<p id="demo"></p>
<hr />
<h4>Find the index of Orange:</h4>
<button onclick="myIndex()">Find Index</button>
<p id="demo1"></p>
<hr />
<h4>Swap Orange with Kiwi, using index access:</h4>
<button onclick="mySwap()">Swap it</button>
<p id="demo2"></p>
<script>
var fruits = ["Banana", "Orange", "Apple", "Mango"];
document.getElementById("demo").innerHTML = fruits;
function myIndex() {
    document.getElementById("demo1").innerHTML = fruits.indexOf("Orange");
}
function mySwap() {
    fruits[1] = "Kiwi"; // Swap Orange with Kiwi
    document.getElementById("demo2").innerHTML = fruits;
}
</script>
</body>