Clib Is Digit Method
The Clib Is Digit method returns True if the value you specify in the char argument is a decimal digit from 0 through 9. If the value you specify is not one of the these values, then it returns Null.
The arguments for this method are the same as the arguments for the Clib Is Alphabetic method. For more information, see Clib Is Alphabetic Method.
Format
Clib.isdigit(char)