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<!DOCTYPE html> <html> <body> <h1>Math.trunc()</h1> <p>单击按钮显示 8.76 的整数部分。</p> <button onclick="myFunction()">试一试</button> <p id="demo"></p> <script> function myFunction() { document.getElementById("demo").innerHTML = Math.trunc(8.76); } </script> </body> </html>