$isdate

Tests if a character string is a valid date.

Syntax

$isdate(string)

Parameters

string

a character string or an expression that evaluates to a character string

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.

 

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