两数相加会产生新数两数相加会产生新数<!DOCTYPE html><html><body> <h1>JavaScript 数字</h1> <p>如果您对两个数相加,结果将是一个数:</p> <p id="demo"></p> <script>var x = 10;var y = 20;var z = x + y;document.getElementById("demo").innerHTML = z;</script> </body></html>