In one embodiment, the present disclosure pertains to automated data type determination of variables that are written in a programming language. In one embodiment, a programming language statement is received. The programming language statement includes a variable, an expression to which the variable is set, and a request to determine a data type of the variable. The expression is processed to deduce a data type of the expression. In certain embodiments, the data type of the expression is then assigned as the data type of the variable such that the data type can be used when the programming language statement is compiled into machine executable code.