ALPHA Function

Searches a string for alphabetic characters.

Syntax

ALPHA(expression)

Syntax Elements

expression is any valid DataBasic expression or any string, substring, or value; expressed as a variable name, a value, or a string enclosed in quotes.

Comment

ALPHA returns a 1 (true) if expression is a string containing only upper and/or lower case alphabetic characters.

Examples

X = "123 WINDSOR AVE."
IF ALPHA(X) THEN PRINT "OKAY" ELSE GO 99

Returns a 0, because string X contains numeric values. Control transfers to statement 99.

CITY = "London"
IF ALPHA(CITY) THEN PRINT "ALL LETTERS" ELSE STOP

Returns a 1 and prints ALL LETTERS, because CITY contains only upper and lower case alphabetic characters.