File: isalpha.doc

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\DOC isalpha

\TYPE {isalpha : string -> bool}

\SYNOPSIS
Tests if a one-character string is alphabetic.

\DESCRIBE
The call {isalpha s} tests whether the first character of string {s} (normally 
it is the only character) is alphabetic, i.e. an uppercase or lowercase 
letter, an underscore or a prime character.

\FAILURE
Fails if the string is empty.            

\SEEALSO
isalnum, isbra, isnum, issep, isspace, issymb.

\ENDDOC