inc/functions/calc.php
calc(term) makes RPN calculation.
Expressions are calculations within the fields of the tuple using an RPN notation. An expression can contain
- constants or templates
- numbers
- quoted strings (use double quotes)
- + - * / . (concat) :: (concat with double ::)
- ABS SIGN SQRT RAND COPY POP SWAP SUBSTR REPLACE
As you see, the functions are uppercase like all keywords in the query function.