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A word written in Forth can act as a compiler.
at is an IMMEDIATE word.
- When the word "at" is used inside the
definition of a word, it compiles into the current definition the
specified operations and IF ... THEN logic structure.
- "at" parses the rest of the input line to
place the specified actions within the IF ... THEN structure.
In Forth we can also write a word which may be used to
CREATE new words.