Home Contents | # datetime:isNull | Date/Time | Core4 Lua Commands

## SYNOPSIS

1. flag = datetime:isNull()
2. flag = datetime:isValid()

## DESCRIPTION

datetime:isNull() checks if datetime is null (0000-00-00T00:00:00), which is also an invalid date/time.

date:isValid() checks if datetime is a valid value.

## RETURN VALUE

A boolean indicating the success of the check.

## ERRORS

Raises an error if datetime is not a datetime instance.

## EXAMPLE

> >
dt = clock.newDateTime() print(dt:isNull(), dt:isValid())
true false

## SEE ALSO

clock.currentDateTime, clock.newDateTime, clock.setDateTime, clock.tzget, clock.tzset, datetime(), datetime:addDays, datetime:addMonths, datetime:addSecs, datetime:addYears, datetime:base90, datetime:date, datetime:day, datetime:daysTo, datetime:format, datetime:hour, datetime:isdst, datetime:minute, datetime:month, datetime:msec, datetime:offset, datetime:second, datetime:secsTo, datetime:set, datetime:setBase90, datetime:time, datetime:toLocal, datetime:toUTC, datetime:year, datetime:zone, tostring(datetime)