Try it Editor: JavaScript Array.map()

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<!DOCTYPE html>
<html>
<body>

<h2>JavaScript Array.map()</h2>

<p>Creates a new array by performing a function on each array element.</p>

<p id="demo"></p>

<script>
var numbers1 = [4, 9, 16, 25];
var numbers2 = numbers1.map(myFunction);

document.getElementById("demo").innerHTML = numbers2;

function myFunction(value, index, array) {
    return value * 2;
}
</script>

</body>
</html>

Result :