What does the Double Star operator mean in Python?
Double Star or (**) is one of the Arithmetic Operator (Like +, -, *, **, /, //, %) in Python Language. It is also known as Power Operator.
What is the Precedence of Arithmetic Operators?
Arithmetic operators follow the same precedence rules as in mathematics, and they are: exponential is performed first, multiplication and division are performed next ,followed by addition and subtraction.
Arithmetic operators priorities order in Decreasing Mode:
() >> ** >> * >> / >> // >> % >> + >> -
Uses of Double Star operator:
As Exponentiation Operator
For numeric data types, double-asterisk (**) is defined as an Exponentiation Operator:
As arguments in functions and methods
In a function definition, the double asterisk is also known **kwargs. They used to pass a keyword, variable-length argument dictionary to a function. The two asterisks (**) are the important element here, as the word kwargs is conventionally used, though not enforced by the language.
First, let’s simply print out the **kwargs arguments that we pass to a function. We’ll create a short function to do this:
The value of name_1 is Shrey The value of name_2 is Rohan The value of name_3 is Ayush
Now here is another example where we will pass additional arguments to the function to show that **kwargs will accept any number of arguments:
The value of name_1 is Ayush The value of name_2 is Aman The value of name_3 is Harman The value of name_4 is Babber The value of name_5 is Striver
Using **kwargs provides us with the flexibility to use keyword arguments in our program. When we use **kwargs as a parameter, we don’t need to know how many arguments we would eventually like to pass to a function. Creating functions that accept **kwargs are best used in situations where you expect that the number of inputs within the argument list will remain relatively small.
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