Python

Use of Python double slash (//)

The double slash (//) operator is used in python for different purposes. One use of this operator is to get the division result. The division result of two numbers can be an integer or a floating-point number. In python version 3+, both the single slash (/) operator and the double slash (//) operator are used to get the division result containing the floating-point value. One difference is that the single slash operator returns proper output for the floating-point result, but the double slash operator can’t return the fractional part of the floating-point result. Another use of the double slash (//) operator is to internally define the window path value. Two uses of the double slash (//) operator have been shown in this tutorial.

Example-1: Division using single slash (/) and double slash (//) operator

Create a python file with the following script to check the difference between the output of the single slash and double slash operator for the division operation. In the script, 5 is defined as the divider value, and 2 is defined as the divisor value. The division result and the type of the result of 5/2, 5//2, 5//2.0, and 5.0//2 will be printed after executing the script.

# Define the divider value

num1 = 5

# Define the divisor value

num2 = 2

# Divide using single slash

result = num1 / num2

print("The division result of %d/%d = %0.2f" % (num1, num2, result))

print("The type of the result", type(result))

# Divide using double slash

result = num1 // num2

print("The division result of %d//%d = %0.2f" % (num1, num2, result))

print("The type of the result", type(result))

# Divide using double slash and float divisor value

result = num1 // float(num2)

print("The division result of %d//%0.2f = %0.2f" % (num1, num2, result))

print("The type of the result", type(result))

# Divide using double slash and float divider value

result = float(num1) // num2

print("The division result of %0.2f//%d = %0.2f" % (num1, num2, result))

print("The type of the result", type(result))

Output:

The following output will appear after executing the script. The result of 5/2 is appropriate, and the return type is float. The result of 5//2 is not appropriate, and the return type is an integer. The fractional part has been omitted from the output. The result of 5//2.00 is not appropriate, and the return type is float. The fractional part has been omitted from this output also. The result of 5.00//2 is not appropriate, and the return type is float. The fractional part has been omitted from this output also.

Example-2: Replace the path defined by the double slash (//) operator

The backward slash (\) is used to define the path in windows, and slash (/) is used to define the path in Linux operating system. When any windows path is defined in a python variable, then the backward slash (\) is stored by the double slash (\\). So, the double slash (\\) requires to convert into forward-slash (/) to define the path in Linux format. Create a python file with the following script that assigns a windows path into a variable and replaces the double slash of the path with the forward-slash (/). The original and updated paths will be printed after executing the script.

# Define a path

pathVal = r"C:\Windows\System\Speech"

# Print the path value

print("The original path value:\n", pathVal)

# Replace the path by forward slash(/)

updated_path = pathVal.replace("\\", "/")

# Print the updated path

print("The updated path value:\n", updated_path)

Output:

The following output will appear after executing the script. The output shows that the windows path has been converted into the Linux path format.

Conclusion:

The use of the double slash (//) operator in Python 3+ has been shown in this tutorial by using simple examples to understand the purposes of using this operator.

About the author

Fahmida Yesmin

I am a trainer of web programming courses. I like to write article or tutorial on various IT topics. I have a YouTube channel where many types of tutorials based on Ubuntu, Windows, Word, Excel, WordPress, Magento, Laravel etc. are published: Tutorials4u Help.