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<!DOCTYPE html> <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 undefined x = 5; // Now x is a Number x = "John"; // Now x is a String document.getElementById("demo").innerHTML = x; </script> </body> </html>
