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.

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. »

Convert a string to an expression, and evaluate the expression:

Interpret a TraditionalForm string:

Convert boxes to Mathematica input:

Convert MathML strings to expressions:

Convert

strings to expressions: