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<!DOCTYPE html> <html> <body> <h2>JavaScript 字符串</h2> <p>字符串写在引号内。</p> <p>您可以使用单引号或双引号：</p> <p id="demo"></p> <script> var carName1 = "Volvo XC60"; var carName2 = 'Volvo XC60'; document.getElementById("demo").innerHTML = carName1 + " " + carName2; </script> </body> </html>