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<!DOCTYPE html> <html> <body> <p>可以将函数视为值：</p> <p>x = myFunction(4,3) or x = 12</p> <p>在这两种情况下，x 都变成一个值为 12 的数字。</p> <p id="demo"></p> <script> function myFunction(a, b) { return a * b; } var x = myFunction(4, 3); document.getElementById("demo").innerHTML = x; </script> </body> </html>