Hold

Hold[expr] maintains expr in an unevaluated form.

Hold has attribute HoldAll, and performs no operation on its arguments.

Example: Hold[1+1] .

Hold is removed by ReleaseHold.

Hold[, , ... ] maintains a sequence of unevaluated expressions to which a function can be applied using Apply.

Even though expr itself is not evaluated, Hold[expr] may still evaluate if expr is of the form f[args], and upvalues for f have been defined.

See The Mathematica Book: Section 2.5.5.

See also: HoldPattern, HoldForm, HoldComplete, Unevaluated, HoldAll, Symbol.

Further Examples