Because most semantics manifest through syntax. Syntax is how the programmer communicates their intent and gets access to the semantics of the underlying system.
A contrived case is the construction and use of lists built of CONS cells in lisp style languages. You can certainly do this in most any language, but creating CONS cells readily without something like an S-expression would be tedious and awkward indeed, to the point that folks would drift to something else more naturally represented in their language than something based on CONS cells.
A contrived case is the construction and use of lists built of CONS cells in lisp style languages. You can certainly do this in most any language, but creating CONS cells readily without something like an S-expression would be tedious and awkward indeed, to the point that folks would drift to something else more naturally represented in their language than something based on CONS cells.