In the Numeric Types documentation for 2.6, 3.0, and 3.1 trunc is 
documented as a built-in, like round, but while there is a trunc in math 
there is no built-in trunc. Read some of the debate on trunc from a year 
ago convinced me that this discrepancy is a documentation problem not a 
problem with the built-in functions.  Sorry if I'm completely off target 
here, but since I noticed I figured it was worth an issue.

Confirmed for 3.0 that trunc does not exist in the builtins module and
is not listed in the Built-in functions section but is listed in the
Numeric Types section.  So I agree "trunc(x) x truncated to Integral "
should leave the Operation table.

Yes, MM, we do want to clean up such discrepancies.

trunc is in the math module and is listed in its doc.