Initializing help system before first use

isvalid

Purpose
Check whether a date, time or datetime is valid.
Synopsis
function isvalid(d:date):boolean
function isvalid(t:time):boolean
function isvalid(dt:datetime):boolean
Arguments
d 
A date object
t 
A time object
dt 
A datetime object
Return value
True if the argument is valid.
Further information
A date is valid if its month number is in the range 1-12 and its day number is in the range 1-31 and is compatible with its month number (for instance 2006-2-29 is not a valid date). A time is valid if it is positive and smaller than an entire day. A datetime is valid if both its date part and its time part are valid.
Module
mmsystem

Parent Topic Procedures and functions

© 2001-2025 Fair Isaac Corporation. All rights reserved. This documentation is the property of Fair Isaac Corporation (“FICO”). Receipt or possession of this documentation does not convey rights to disclose, reproduce, make derivative works, use, or allow others to use it except solely for internal evaluation purposes to determine whether to purchase a license to the software described in this documentation, or as otherwise set forth in a written software license agreement between you and FICO (or a FICO affiliate). Use of this documentation and the software described in it must conform strictly to the foregoing permitted uses, and no other use is permitted.