A variable creates a symbol that can bind to values but does not actually itself vary. And it typically uses the = syntax while not implying equality. Also most usages do not change the bound values so nothing varies
Abstract syntax trees are a result of parsing syntax, they are structures that have only the building blocks of the language with all the syntax stripped out.
Lisp sexp's have nothing to do with sex nor lisp with speech impediments
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A variable creates a symbol that can bind to values but does not actually itself vary. And it typically uses the = syntax while not implying equality. Also most usages do not change the bound values so nothing varies
Abstract syntax trees are a result of parsing syntax, they are structures that have only the building blocks of the language with all the syntax stripped out.
Lisp sexp's have nothing to do with sex nor lisp with speech impediments