Node:Syntax Tutorial, Next:Crash Course Tutorial, Previous:Starting Gforth Tutorial, Up:Tutorial
A word is a sequence of arbitrary characters (expcept white
space). Words are separated by white space. E.g., each of the
following lines contains exactly one word:
word !@#$%^&*() 1234567890 5!a
A frequent beginner's error is to leave away necessary white space,
resulting in an error like Undefined word; so if you see such an
error, check if you have put spaces wherever necessary.
." hello, world" \ correct ."hello, world" \ gives an "Undefined word" error
Gforth and most other Forth systems ignore differences in case (they are
case-insensitive), i.e., word is the same as Word. If
your system is case-sensitive, you may have to type all the examples
given here in upper case.