isalpha
Tests the next character in the input stream to see if it is alphabetic.
Syntax
isalpha
Comments
isalpha causes a failure to occur if the next non-space character in the data file is not alphabetic.
After this operation, the file continues to be positioned over the character in question; that is, the pointer does not advance.
isalpha can only be used in the header block of a template.
Example
if { isalpha } then
{
// act appropriately if it is a letter
} else
{
// act appropriately if it is not a letter
}