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<!DOCTYPE html>
<html>
<body>
<h1>JavaScript Arrays</h1>
<h2>The every() Method</h2>
<p>every() returns true if all elements in an array pass a test (provided as a function).</p>
<p id="demo"></p>
<script>
const ages = [32, 33, 16, 40];
document.getElementById("demo").innerHTML = ages.every(checkAge);
function checkAge(age) {
  return age > 18;
}
</script>
</body>
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</html>