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<!DOCTYPE html> <html> <body> <h1>JavaScript Numbers</h1> <h2>Integer Precision</h2> <p>Integers (numbers without a period or exponent notation) are accurate up to 15 digits:</p> <p id="demo"></p> <script> let x = 999999999999999; let y = 9999999999999999; document.getElementById("demo").innerHTML = x + "<br>" + y; </script> </body> </html>
