isalpha_return_alphabetic_character_.htm
| Navigation: Language Reference > 13 - Built-in Functions >====== ISALPHA (return alphabetic character) ====== |    |
ISALPHA( string )
| ISALPHA | Returns whether the string passed to it contains an alphabetic character. |
| string | The label of the character string to test. If the string contains more than one character, only the first character is tested. |
The ISALPHA procedure returns TRUE if the string passed to it is alphabetic (an upper or lower case letter) and false otherwise. This is independent of the language and collation sequence. This procedure requires that CLACASE has been set in the application's environment file or through the LOCALE statement.
| Return Data Type: | LONG |
Example:
SomeString STRING(1)
CODE
SomeString = 'A' !ISALPHA returns true
IF ISALPHA(SomeString)
X#= MESSAGE('Alpha string')
END
SomeString = '1' !ISALPHA returns false
IF ISALPHA(SomeString)
X#= MESSAGE('Alpha string')
ELSE
X#= MESSAGE('Not Alpha string')
END
See Also:
isalpha_return_alphabetic_character_.htm.txt · Last modified: 2021/04/15 15:57 by 127.0.0.1