YouTipPython eval() Function
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Python eval() Function
Description
The eval() function evaluates the specified expression (as a valid Python expression) and returns the result.
Syntax
eval(expression, globals=None, locals=None)
Parameters
- expression: This is the expression to be evaluated, as a string.
- globals: This is a dictionary object that holds global variables and available built-in functions.
- locals: This is a dictionary object that holds local variables and available built-in functions.
Return Value
Returns the result of evaluating the expression.
Example
The following example demonstrates the usage of the eval() function:
#!/usr/bin/python3
x = 7
print(eval('3 + x'))
print(eval('pow(2,3)'))
print(eval('2 + 2'))
print(eval('"a" + "b"'))
Output:
10
8
4
ab
Another example:
#!/usr/bin/python3
n=81
print(eval('n + 4'))
Output:
85