eval

Execute a string as MathJet code.

Syntax

eval(str)
[a1, a2, ...] = eval(str)

Description

Parses and evaluates str as MathJet code in the caller’s workspace. The string can contain any expression or statement. Variables created by eval persist in the caller’s scope.

Use sparingly: eval defeats compile-time checks and is a common source of subtle bugs. Most uses can be replaced with structures, function handles, or dynamic field access (s.(fieldname)).

Examples

eval('x = 1 + 2;')          % x is now 3 in the caller
eval('sqrt(16)')            % 4

See also

• evalin — Evaluate a string in a different workspace.
• evalc — Evaluate a string and capture its console output.
• assign — Assign a value to a variable by name.
• feval