Vertical bar 竖线
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.