BUILT-IN MATHEMATICA SYMBOL

ToExpression

ToExpression[input]
gives the expression obtained by interpreting strings or boxes as Mathematica input.

ToExpression[input, form]
uses interpretation rules corresponding to the specified form.

ToExpression[input, form, h]
wraps the head h around the expression produced before evaluating it.

Details Details

form can be InputForm, StandardForm, TeXForm, TraditionalForm, or MathMLForm.
ToExpression["string"] uses InputForm interpretation rules.
ToExpression[boxes] uses StandardForm interpretation rules.
ToExpression prints a message and returns $Failed if it finds a syntax error. ToExpression does not call $SyntaxHandler. »
The input given in ToExpression can correspond to multiple Mathematica expressions. ToExpression processes each one in turn, just like Get. »
ToExpression[input, form, Hold] can be used to convert input to an expression, but with the expression wrapped in Hold to prevent evaluation. »
ToExpression uses any relevant definitions given for MakeExpression.