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Delimiters are symbols or characters used to separate, enclose, or otherwise define the boundaries of text, data, or other elements within a document or data structure. They play a crucial role in various fields such as programming, data processing, and text formatting. Delimiters can be single characters or sequences of characters, and their choice depends on the specific context and requirements of the task at hand.

In programming, delimiters are commonly used to separate different parts of code, such as statements, expressions, or data elements. For example, commas are often used as delimiters in lists, while semicolons are used to separate statements in languages like C and Java. Parentheses, brackets, and braces are used to enclose expressions, define function parameters, or denote code blocks.

In data processing, delimiters are essential for parsing and structuring data. Common delimiters in this context include commas, tabs, and vertical bars. For instance, comma-separated values (CSV) files use commas as delimiters to separate data fields within each record. Similarly, tab-separated values (TSV) files use tabs as delimiters.

In text formatting, delimiters are used to define the structure and style of text. For example, quotation marks are delimiters that enclose quoted text, while asterisks or underscores are used to denote emphasis or italicized text in Markdown.

The choice of delimiters should be made carefully, considering factors such as readability, compatibility, and the specific requirements of the task. It is also important to ensure that delimiters do not conflict with the content they are used to separate or enclose. For example, using a comma as a delimiter in a CSV file should be avoided if the data itself contains commas, as this can lead to parsing errors. In such cases, alternative delimiters or escaping mechanisms may be employed to resolve the conflict.