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# What does '//' mean in python?

In this article, we will learn about the // operator in Python in detail.

To do floor division in Python, use the **double slash //** operator. This // operator divides the first number by the second number and rounds the result to the closest integer (or whole number).

## Syntax of // Operator

To utilize the double slash **//** operator, follow the same steps as in regular division. The only difference is that you use a double slash // instead of a single slash / −

### Syntax

first_number// second_number

## Floor Division

### Algorithm (Steps)

Following are the Algorithm/steps to be followed to perform the desired task. −

Create a variable to store the input number 1.

Create another variable to store the input number 2.

Use the double slash // operator, to perform the floor division by dividing inputNumber_1 by inputNumber_2 and create another variable to store it. The

**double-slash(//)**operator returns the result as an integer by rounding off to the nearest integer.Print the result of the floor division of inputNumber_1 by inputNumber_2.

### Example

The following program returns the floor division of the first number by the second one using the// operator in Python −

# input number 1 inputNumber_1 = 10 # input number 2 inputNumber_2 = 3 # performing floor division by dividing inputNumber_1 by inputNumber_2 # it returns the result as an integer by rounding off to the nearest integer result_number = inputNumber_1 // inputNumber_2 # printing the result of floor division of inputNumber_1 by inputNumber_2 print("floor division of inputNumber_1 by inputNumber_2 = ", result_number)

### Output

floor division of inputNumber_1 by inputNumber_2 = 3

## Showing the Difference Between // and / Operators

### Algorithm (Steps)

Following are the Algorithm/steps to be followed to perform the desired task. −

Creating a variable to store the input numbe1.

Creating another variable to store the input numbe2.

Use the

**double slash(//)**operator to perform the floor division by dividing inputNumber_1 by inputNumber_2. It returns the result as an integer by rounding off to the nearest integerPrint the result of the floor division of inputNumber_1 by inputNumber_2

Use the

**single slash(/)**to perform division by dividing inputNumber_1 by inputNumber_2. It returns the result as a floating-point number.Print the result of the division of

**inputNumber_1 by inputNumber_2.**

### Example

The following program returns the floor division and division of the first number by the second one using the // and / operators in Python −

# input number 1 inputNumber_1 = 10 # input number 2 inputNumber_2 = 3 # performing floor division by dividing inputNumber_1 by inputNumber_2 using // # it returns the result as an integer by rounding off to the nearest integer result_floordiv = inputNumber_1 // inputNumber_2 # printing the result of floor division of inputNumber_1 by inputNumber_2 print("Floor division of inputNumber_1 by inputNumber_2 = ", result_floordiv) # performing division by dividing inputNumber_1 by inputNumber_2 using / # it returns the result as a floating-point number result_div = inputNumber_1 / inputNumber_2 # printing the result of the division of inputNumber_1 by inputNumber_2 print("Division of inputNumber_1 by inputNumber_2 = ", result_div)

### Output

Floor division of inputNumber_1 by inputNumber_2 = 3 Division of inputNumber_1 by inputNumber_2 = 3.3333333333333335

The above code shows that the **double slash(//) operator** rounds down the result of the division of two numbers to the nearest whole number.

**NOTE** − If we do floor division with a negative number, the result would still be rounded down(nearest integer)

## Double Slash // Operator Functions Similarly to math.floor()

In Python, **math.floor()**, like the double slash // operator, rounds down a number to the nearest integer.

### Example

Because they do the same thing behind the scenes, **math.floor() is an alternative** to the **// operator.**

# importing math module import math # input number 1 inputNumber_1 = 10 # input number 2 inputNumber_2 = 3 # performing floor division by dividing inputNumber_1 by inputNumber_2 using // # it returns the result as an integer by rounding off to the nearest integer result_floordiv = inputNumber_1 // inputNumber_2 # printing the result of floor division of inputNumber_1 by inputNumber_2 print("Floor division of inputNumber_1 by inputNumber_2 = ", result_floordiv) # performing division by dividing inputNumber_1 by inputNumber_2 using / # it returns the result as a floating-point number result_mathfloor = math.floor(inputNumber_1 / inputNumber_2) # printing the result of the division of inputNumber_1 by inputNumber_2 print("math.floor of inputNumber_1 by inputNumber_2 = ", result_mathfloor)

### Output

Floor division of inputNumber_1 by inputNumber_2 = 3 math.floor of inputNumber_1 by inputNumber_2 = 3

## Behind the Scenes of the Double Slash // Operator

When you use the **// operator** to divide two numbers, the **__floordiv__()** function is called behind the scenes.

### Example

The following program shows the how the // operator works −

# importing math module import math # input number 1 inputNumber_1 = 10 # input number 2 inputNumber_2 = 3 # performing floor division by dividing inputNumber_1 by inputNumber_2 using // # it returns the result as an integer by rounding off to the nearest integer result_floordiv = inputNumber_1 // inputNumber_2 # printing the result of floor division of inputNumber_1 by inputNumber_2 print("Floor division of inputNumber_1 by inputNumber_2 = ", result_floordiv) # performing division by dividing inputNumber_1 by inputNumber_2 using / # it returns the result as a floating-point number floordiv = inputNumber_1.__floordiv__(inputNumber_2) # printing the result of the division of inputNumber_1 by inputNumber_2 print("The floordiv method returns the same result as = ", floordiv)

### Output

Floor division of inputNumber_1 by inputNumber_2 = 3 The floordiv method returns the same result as = 3

## Conclusion

You've learned how to utilize the double slash // operator and how it works behind the scenes in this tutorial. In addition, you learned about two // operator alternatives: math.floor() and the __floordiv__() function.

Don't get mixed up on which to use. The three methods of floor division all work in the same way. However, I recommend that you utilize the double slash // operator because it allows you to type less.

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