$$ 1.Datatypes\ 2._Variables\ 3.if\ 4.loops\ 5.Funtions\
Datatypes(include\ "int(a)" \ cases\ later)\Rightarrow \begin{cases} int\ float\ double\ bool\ char\ string\ array \ (singleType)\ array \ (anyType) \end{cases} \ Grammar:\ Start \ token:\ [Datatype]\Rightarrow \begin{cases} [varName]\ [funtionName] \end{cases}\ [varName]\Rightarrow \begin{cases} [Expr]\ \end{cases} \ [Expr]\Rightarrow \begin{cases} [value]\ [Expr]\ [varName]\ [funtionName] \ (funtionCall) \end{cases}\ [return]\Rightarrow \begin{cases} [Expr]\ \end{cases}