vertical line (absolute value, determinant, ...etc. symbol)

  • Syntax: \left|...\right|
  • Ex.: $$\left|b-a\right|$ gives \left|b-a\right| </li><li><u>Ex.:</u> $${\rm~det}\left|\begin{array}{cc}a&b\\c&d \end{array}\right|$ gives  

{\rm~det}\left|\begin{array}{cc}a&b\\c&d \end{array}\right| 

 
("\rm~something" renders "something" in roman style)

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