What is the meaning of the * operator in Python?
In this article, we will learn the meaning of the * operator in Python, which is widely used in software written in Python.
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The * operator is used most of the time to do multiplication operations.
Check it out:
print(5 * 9) a = 2 b = 3 print(a * b)
We can also use it to calculate a power, using ** twice, see it out:
print(2 ** 4) a = 2; b = 8; print(a ** b)
But another way we can use the * is like a special syntax in functions
Indicating that that function can take an indeterminate number of arguments
Note: when the parameter is used in this way, it must be the last in position
Take a Look:
def test(*params): for i in params: print(i) test(1,2,3,4,5) # 1 2 3 4 5
There is also the ** syntax in functions, which makes it possible to get the parameter by name, if it is passed
See an example:
def test(**params): if params['name']: print(params['name']) test(name="Matheus", age=29)
And these are the different ways to use the * parameter in Python!
In this article we saw what the * operator means in Python
We have several possibilities of use, the most common being multiplication
And then two cases for functions that work with parameters
If used once with the parameter name, *param, is expecting undefined parameters
If used twice with the parameter, **param, wait indefinite and can select by name, if passed
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