PostgreSQL User's Guide
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# Numerical Operators

Table 4-3. Postgres Numerical Operators

Operator | Description | Usage
--- | --- | ---
! | Factorial | 3 !
!! | Factorial (left operator) | !! 3
% | Modulo | 5 % 4
% | Truncate | % 4.5
* | Multiplication | 2 * 3
+ | Addition | 2 + 3
- | Subtraction | 2 - 3
/ | Division | 4 / 2
: | Natural Exponentiation | : 3.0
@ | Absolute value | @ -5.0
^ | Exponentiation | 2.0 ^ 3.0
|/ | Square root | |/ 25.0
||/ | Cube root | ||/ 27.0

> Note: Two operators, ":" and ";", are now deprecated and will be removed in the next release. Use the equivalent functions exp() and ln() instead.

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