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<html><body><h2>JavaScript Data Types</h2><p>JavaScript has dynamic types. This means that the same variable can be used to hold different data types:</p><p id="demo"></p><script>let x; // Now x is undefinedx = 5; // Now x is a Numberx = "John"; // Now x is a Stringdocument.getElementById("demo").innerHTML = x;</script></body></html>