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<!DOCTYPE html>
<html>
<body>
<h2>JavaScript Array.every()</h2>
<p>The every() method checks if all array values pass a test.</p>
<p id="demo"></p>
<script>
var numbers = [45, 4, 9, 16, 25];
var allOver18 = numbers.every(myFunction);
document.getElementById("demo").innerHTML = "All over 18 is " + allOver18;
function myFunction(value, index, array) {
  return value > 18;
}
</script>
</body>
</html>