ALPHA
Determines if a string is alphabetic or not.
Synopsis
ALPHA(string)
Arguments
| string | An expression that resolves to a string. |
Description
If string consists entirely of alphabetic characters, ALPHA returns 1. Otherwise, ALPHA returns 0. Note that blank spaces are non-alphabetic characters. Dynamic array separator characters are considered to be alphabetic characters. On a Unicode system ALPHA recognizes Unicode letters as alphabetic characters.
Examples
The following example uses the ALPHA function to determine if a string consists of only alphabetic characters:
PRINT ALPHA("abcdefg"); ! Returns 1
PRINT ALPHA("AbCdEfG"); ! Returns 1
PRINT ALPHA("my string"); ! Returns 0 (space not allowed)
PRINT ALPHA("half-wit"); ! Returns 0 (hyphen not allowed)
PRINT ALPHA(""); ! Returns 0
PRINT ALPHA(123); ! Returns 0
See Also
-
NUM function
