shell中使用read如何换行

最新推荐文章于 2025-04-10 10:45:19 发布

转载最新推荐文章于 2025-04-10 10:45:19 发布 · 1.3w 阅读

本文介绍如何在Bash脚本中使用转义序列来插入特殊字符，如换行符，并通过示例展示了如何利用这些特性来实现文本格式化。

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例如：

read -p $'Please Enter the percent [30 between 100]\x0a The value is  Default = 80   :' scale_percent

we use above syntax to insert hex values, we insert \x0a which is the hexadecimal value of the newline character (LF). You can use same syntax above with echo to produce new lines, eg:

echo $'One line\x0asecond line'

This is a feature of BASH 2, it is documented here, the $'' is used to translate all escape sequences inside it for its ascii transcription. So we could obtain the same result of example above, this way: