A newline, often referred to as a line break, is a special character in text that indicates the end of one line and the beginning of another. In programming and text processing, it is represented by symbols like LF (Line Feed) or CR (Carriage Return). Newlines help organize text, making it easier to read and understand by separating paragraphs, lists, or other content. In many programming languages, inserting a newline can be done using escape sequences, such as "\n" in Python or "Java". Newlines are essential for formatting output in console applications and for structuring data in files, such as CSV or JSON.