05 May 2016
The identifier is the name for program elements (functions, variables, etc.) freely selected by the programmer:
- The identifier must begin with a letter or underscore character;
- Numbers can be used in the identifier along with the letters starting from the second position;
- The characters input are case sensitive when specifying identifiers;
- Space is a separator and can not be used inside the identifier;
- Reserved words are not allowed as identifiers.