Messages

I have just begun to use the GLBasic programming language, and have noticed that all variables are seen by the compiler to have some sort of error. This was what I saw when I copied and pasted a program that was to print multiple variables:

"Hello, World!.gbas"(18) warning : probably unassigned variable : a$
"Hello, World!.gbas"(18) warning : probably unassigned variable : b$
"Hello, World!.gbas"(18) warning : probably unassigned variable : c
"Hello, World!.gbas"(19) warning : probably unassigned variable : d$
"Hello, World!.gbas"(18) error : variable is not explicitly defined : a$

It would be greatly appreciated if anybody could help me solve this problem.
                                                                                                                                                                                     Thank you,
                                                                                                                                                                                       -Nucleus