竖线 Vertical bar
（重定向自Vertical slash）
竖线（|）是一个字符，在数学上有各种各样的用途，包括用作表示绝对值，而在计算和编程中，以及一般的版式中，它有分隔的用途，与间隔号有相似之处。它在不同范畴有不同名称，如管道、谢费尔竖线等。
Vertical slash
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英语百科
Vertical bar 竖线
（重定向自Vertical slash）
Some variants of the EBCDIC family of code pages such as EBCDIC 500 distinguished the broken bar from the solid vertical bar.
Additional related Unicode characters:
In LaTeX, the vertical bar can be used as delimiter in mathematical mode. The sequence \| creates a double vertical line (a | b \| c is set as 
). This has different spacing from \mid and \parallel, which are relational operators: a \mid b \parallel c is set as 
. In LaTeX text mode, the vertical bar produces an em dash (—), or one can use the \textbar command instead.
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