Question

How to access an array item with index in JavaScript

Answer 1

<script type="text/JavaScript">   

var arr = ["aaa", "bbb", "ccc", "ddd"];

document.write(arr[0] + "<br />"); // first item
document.write(arr[1] + "<br />");
document.write(arr[arr.length - 1] + "<br />"); // last item

/*
run:

aaa
bbb
ddd

*/
    
</script>

 

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Answer 2

<script type="text/JavaScript">   

var arr = ["aaa", "bbb", "ccc", "ddd"];

arr[0] = "uvwxyz";
document.write(arr[0] + "<br />"); // first item


/*
run:

uvwxyz

*/
    
</script>

 

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