Editar el código:
ver Resultados »
Inténtalo tú mismo - ©
w3ii.com
<!DOCTYPE html> <html> <body> <h1>JavaScript is Case Sensitive</h1> <p>Try change lastName to lastname.</p> <p id="demo"></p> <script> var lastName = "Doe"; var lastname = "Peterson"; document.getElementById("demo").innerHTML = lastName; </script> </body> </html>