代码示例:(标识:eg_js_function_return)
<!DOCTYPE html>
<html>
<body>

<h2>JavaScript 函数</h2>

<p>本例调用了一个执行计算的函数,然后返回结果:</p>

<p id="demo"></p>

<script>
var x = myFunction(7, 8);
document.getElementById("demo").innerHTML = x;

function myFunction(a, b) {
    return a * b;
}
</script>

</body>
</html>
运行结果: