Python eval () function

Describe

The eval () function is used to execute a string expression and return the value of the expression.

Grammar

The following is the syntax for the Eval () method:

Eval (expression[, globals[, locals])

Parameters

• Expression--expressions.
• Globals--variable scope, global namespace, if supplied, must be a Dictionary object.
• Locals--variable scope, local namespace, if provided, can be any mapping object.

return value

Returns the result of an expression evaluation.

Instance

The following shows an example of using the Eval () method:

>>>x = 7>>> eval (' 3 * x ') 21>>> eval (' Pow (2,2) ') 4>>> eval (' 2 + 2 ') 4>>> eval ( "N + 4") 85

Python eval () function