Bracket Symbols

Written by Jerry Ratzlaff on . Posted in Nomenclature & Symbols for Engineering, Mathematics, and Science

This is a list of the most common bracket symbols:

SymbolDefinitionExample
\(\left(\; \right)\) parentheses, calculate expression inside first \( 5\times \left(5+4\right) = 45\)
\(\left[\; \right]\) brackets, calculate expression inside first \( \left[ \left(5+4\right) \times \left(9+4\right) \right] = 117\)
\(\{ \; \}\) set, a collection \(a = \{4, 5, 9 \} \)
\(\lfloor a \rfloor\) rounds number to lower integer \(\lfloor 5.4 \rfloor = 5\)
\(\lceil a \rceil\) rounds number to upper integer \(\lceil 5.4 \rceil = 6\)
\(\left | a \right |\) absolute value \(\left | -5 \right | = 5 \)