ISALPHA Function

Syntax

Result_Flag as L = ISALPHA(C character)

Arguments

character: A character string.

Description

Returns TRUE if the first character of a string is a letter.

Discussion

ISALPHA() returns . T. (TRUE) if the first character of the specified Character_String is a letter; otherwise, it returns .F. (FALSE).

Example

' if FIRSTNAME contains "Fred"
? isalpha(FIRSTNAME)
= .T.
? isalpha("4WD")
= .F.

Assume that you want to verify that a part number entered into a PARTNUM field starts with a letter. You can use the field rules to define the following validation expression:

isalpha(PARTNUM)