Symbols

Let's revisit "Hello, world!" in Wall.

w> #Hello, world!# =
w> #Hello, world!#
Hello, world!

In this bit of code, we have actually created a symbol called Hello, world!. Symbols in Wall are created in the following manner:

w> #foo bar# =
w> #foo bar#
#foo bar#
w> baz =
w> baz
baz

The code above creates two symbols: foo bar and baz. In instances where a symbol has non-alphanumeric characters, the # character must bookend the symbol. To use a # in a symbol, you can escape it with \. The end of the symbol and the = sign must be separated by at least 1 whitespace.

Multiple symbols can be declared by separating them with whitespace and appending the equals sign to the end of the declaration.

w> foo bar baz =
w> foo
foo
w> bar
bar
w> baz
baz

Symbols are conceptually similar to atoms in Erlang.