Python built-in Method - eval()

The eval() method is a built-in function in Python that evaluates a string as a Python expression and returns the result of the expression.

Here is the syntax for eval() method:

eval(expression, globals=None, locals=None)

where expression is a string that contains a Python expression to be evaluated, and globals and locals are dictionaries that specify the global and local namespaces used for the evaluation (by default, globals and locals are None).

Here's an example of how to use eval():

result = eval("2 + 3")
print(result)

In this example, we call eval() with the string "2 + 3". The expression is evaluated, and the result 5 is returned and assigned to the result variable. The output of the code is 5.

You can also use eval() to evaluate more complex expressions involving variables and functions. Here's an example:

x = 10
y = 5

result = eval("x + y - 3 * (x // y)")
print(result)

In this example, we define two variables x and y and then call eval() with the string "x + y - 3 * (x // y)". The expression is evaluated using the current values of x and y, and the result 12 is returned and assigned to the result variable. The output of the code is 12.

Note that using eval() can be dangerous if the expression being evaluated comes from an untrusted source, as it can potentially execute arbitrary code. It is generally recommended to avoid using eval() with untrusted input.