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