Tests if a character string is a valid date.

Syntax

$isdate(string)

Parameters

Return Value

1-character binary string. Evaluates to 1 ($True) if string meets the validation test; otherwise, evaluates to 0 ($False).

Comments

This function tests if a particular character string is a valid date.

Example

$isdate(“19980606”)

Evaluates to $True.

$isdate(“19980229”)

Evaluates to $False.

$isdate($date)

Evaluates to $True.

$isdate($date+30)

Evaluates to $True.

See Also

$isalphabetic

$isalphanumeric

$isdigit

$islower

$isnumber

$isupper

$iszimname

Character Literals

Functional Expressions