In Forth, comments are written like this:
2 2 ( Now add these numbers...) +
The
English in
parentheses is a comment. The
space after `(' is
important! ( is a Forth
word (marked
IMMEDIATE) that discards the rest of the
line, till the first `)'. Without the space, Forth would look for a word `(Now' instead.
Like everything else in this language, comments can be implemented by the user. Try that in your favourite high level language!