用户输入

例子：

echo -n "Input your favourite fruit:"
read fruit
echo "Your favourite fruit is $fruit"

将读取到的内容放在变量中：

read -p "Input your name:" name
echo "Your name is $name"

-s 参数用于隐藏输入：

read -s -p "Input your passwrod:" password
echo "Your password is $password"

-a 参数用于将输入保存到数组中：

echo -n "Input your hobbies:"
read -a hobbies
echo "Your hoddies are $hobbies"

在不指定变量的情况下，read 会将输入保存到 REPLY 变量中：

read -p "Input your age:"
echo "Your age is $REPLY"
```<style>
  .scroll-to-top {
    font-size: 2.5rem;
    width: 3.2rem;
    height: 3.2rem;
    display: none;
    align-items: center;
    justify-content: center;
    position: fixed;
    padding: 0.75rem;
    bottom: 4rem;
    right: calc(1.25rem + 90px + var(--page-padding));
    z-index: 999;
    cursor: pointer;
    border: none;
    color: var(--bg);
    background: var(--fg);
    border-radius: 50%;
  }
  .scroll-to-top.hidden {
    display: none;
  }
  .scroll-to-top i {
    transform: translateY(-2px);
  }
  @media (min-width: 1080px) {
    .scroll-to-top {
      display: flex;
    }
  }
</style>
<button type="button" aria-label="scroll-to-top" class="scroll-to-top hidden" onclick="scrollToTop()">
  <i class="fa fa-angle-up"></i>
</button>
<script>
  const scrollToTop = () => window.scroll({ top: 0, behavior: "smooth" });
  window.addEventListener("scroll", () => {
    const button = document.querySelector(".scroll-to-top");
    button.classList.toggle("hidden", window.scrollY < 200);
  });
</script>