如何生成随机数并将其用于操作？

Question

我的主要想法是生成某种"random greetings"，想法是生成一个随机数，并取决于要显示的数字"random greeting"。这是我的非工作代码：

<p class="status">Your random splash screen: <span id="greeting">You don't have one</span></p>
<script>
var x = Math.floor((Math.random() * 4) + 1);
if (x == 1) {
  document.getElementById("greeting").innerHTML = "Greeting 1";
} else if (x == 2) {
  document.getElementById("greeting").innerHTML = "Greeting 2";
} else if (x == 3) {
  document.getElementById("greeting").innerHTML = "Greeting 3";
} else if (x == 4) {
  document.getElementById("greeting").innerHTML = "Greeting 4";
}
</script>

我不知道哪里出了问题，请帮忙！

Answer 1

如您所见，代码运行良好：

var x = Math.floor(Math.random() * 4);
var greetings = ['Greeting 1', 'Greeting 2', 'Greeting 3', 'Greeting 4'];

document.getElementById("greeting").innerHTML = greetings[x];

<p id="greeting">Nice to meet you!</p>

如何生成随机数并将其用于操作？

How to generate random number and use it for action?

javascript

random

splash-screen