In this tutorial, we will learn how to work with and input percentages in Python. Percentages are widely used in various calculations, such as determining discounts, calculating interest rates, or even understanding success rates. By the end of this tutorial, you will be able to input a percentage and perform basic calculations using Python programming.
Step 1: Get the user input as a percentage
First, let’s create a Python script to receive a percentage input from the user. We can use the input() function for this purpose:
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percentage_input = float(input("Enter a percentage: ")) |
In this code, we are using the input() function to get input from the user and convert it to a float. We do this because percentages are often expressed as decimal values.
Step 2: Convert the percentage to a decimal
Now that we have the percentage input from the user, let’s convert it to a decimal value for easier computation. To do this, we’ll simply divide the input by 100:
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decimal_value = percentage_input / 100 |
Step 3: Perform calculations with the decimal value
Now that we have the decimal value, we can use it in various calculations. For instance, let’s calculate the price of an item after applying a discount based on the input percentage:
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original_price = 200 discounted_price = original_price * (1 - decimal_value) |
In this example, we assume the original price of an item is 200. We then calculate the discounted price of the item by multiplying the original price by the complement of the decimal value (1 – decimal_value).
Step 4: Display the result to the user
Finally, let’s display the discounted price to the user:
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print(f"The discounted price is: {discounted_price:.2f}") |
Here, we use a formatted string to display the discounted price with two decimal places.
Putting it all together
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percentage_input = float(input("Enter a percentage: ")) decimal_value = percentage_input / 100 original_price = 200 discounted_price = original_price * (1 - decimal_value) print(f"The discounted price is: {discounted_price:.2f}") |
When we run the code, we’ll see the following output for a 10% discount:
Enter a percentage: 10 The discounted price is: 180.00
Conclusion
In this tutorial, we have learned how to input a percentage in Python and use it in calculations. By following these simple steps, you can easily work with percentages in Python for various purposes.
- Get the user input as a percentage
- Convert the percentage input to a decimal value
- Perform calculations using the decimal value
- Display the results to the user