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<html><body><h2>JavaScript is Case Sensitive</h2><p>Try to change lastName to lastname.</p><p id="demo"></p><script> let lastname, lastName; lastName = "Doe"; lastname = "Peterson"; document.getElementById("demo").innerHTML = lastName;</script></body><!-- /js/tryit.asp?filename=tryjs_syntax_case Thu, 06 Feb 2025 18:15:23 GMT --></html>