In Gforth (since 1.0) you can input a string by surrounding it with
" (e.g. "abc", "a b"). The result is the
starting address and byte (=char) count of the string on the data
stack.
You have to escape any " inside the string with \ (e.g.,
"double-quote->\"<-"). In addition, this string syntax
supports all the ways to write control characters that are supported
by s\" (see String and Character literals). A disadvantage
of this string syntax is that it is non-standard; for standard
programs, use s\" instead.
In Gforth (since 1.0) you can input an environment variable by
surrounding its name with ${...}, e.g.,
${HOME}; the result is a string descriptor on the data stack
in the format described above. This is equivalent to "HOME"
getenv, i.e., the environment variable is resolved at run-time.