# $EPIC: isdigit.txt,v 1.1.1.1 2006/07/11 04:57:43 jnelson Exp $
======Synopsis:======
$__isalpha__(<text>) \\ 
$__isdigit__(<text>)

======Technical:======
These function test whether the first character in the given string is
an alphabetical character or a digit.  Only the first character is
tested.

======Practical:======
These functions are useful for testing an input string to see whether it
is a number or a text string.  One use for this might be to check if it
would be suitable input for $[[iptoname]]() or $[[nametoip]]().  Keep in mind
that only the first character is tested, so this isn't a reliable way
to see if the entire string is a number.

======Returns:======
"true" or "false" value if first character is a letter or a digit

======Examples:======
<file>
$isalpha(hello)         returns true
$isalpha(2hello)        returns false
$isdigit(123)           returns true
$isdigit(2abc)          returns true
$isdigit(a123)          returns false
</file>