"HeldExpression" (Interpreter Type)

Wolfram Language expression.

Details

Allowed Forms

  • Any valid Wolfram Language expression.

Restriction Specifications

Interpretation

Examples

Basic Examples  (5)

Interpret expressions and avoid evaluation:

No evaluation is attempted when matching the choices:

By default, only expressions with no side effect are allowed:

This can be changed by allowing All symbols:

Restrict to a list of symbols:

By default, new symbols are created in $Context, but a custom context can be specified:

Introduced in 2014
 (10.0)