# 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:

**Example:**

## Python3

`# Python code to Demonstrate the Exponential Operactor` ` ` `a ` `=` `2` `b ` `=` `5` ` ` `# using double asterisk operator` `c ` `=` `a` `*` `*` `b` `print` `(c)` ` ` ` ` `# using double asterisk operator` `z ` `=` `2` `*` `(` `4` `*` `*` `2` `) ` `+` `3` `*` `(` `4` `*` `*` `2` `-` `10` `)` `print` `(z)` |

**Output:**

32 50

**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:

#### Example:

## Python3

`# Python Program to create a function to get a dictionary of names.` `# Here, we will start with a dictionary of three names` ` ` ` ` `def` `function(` `*` `*` `kwargs):` ` ` `for` `key, value ` `in` `kwargs.items():` ` ` `print` `(` `"The value of {} is {}"` `.` `format` `(key, value))` ` ` ` ` `function(name_1` `=` `"Shrey"` `, name_2` `=` `"Rohan"` `, name_3` `=` `"Ayush"` `)` |

**Output:**

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:

## Python3

`# Python Program to create a function to get a dictionary of as many names` `# you want to include in your Dictionary` ` ` ` ` `def` `function(` `*` `*` `kwargs):` ` ` `for` `key, value ` `in` `kwargs.items():` ` ` `print` `(` `"The value of {} is {}"` `.` `format` `(key, value))` ` ` ` ` `function(` ` ` `name_1` `=` `"Ayush"` `,` ` ` `name_2` `=` `"Aman"` `,` ` ` `name_3` `=` `"Harman"` `,` ` ` `name_4` `=` `"Babber"` `,` ` ` `name_5` `=` `"Striver"` `,` `)` |

**Output:**

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

### Conclusion:

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.

Attention geek! Strengthen your foundations with the **Python Programming Foundation** Course and learn the basics.

To begin with, your interview preparations Enhance your Data Structures concepts with the **Python DS** Course. And to begin with your Machine Learning Journey, join the **Machine Learning – Basic Level Course**