Welcome to this tutorial, where you’ll learn how to round to the nearest tenth in Python. Rounding numbers to specific decimal places is a commonly-used operation in various programming tasks. In Python, this operation can be easily achieved using its built-in round()
function.
Step 1: Understand the round() function
First, let’s get to know the built-in round()
function in Python. This convenient function can take one or two arguments:
round(number, ndigits)
– Rounds a given number to the nearestndigits
decimal place. By default,ndigits
is 0, which means that the result would be a rounded integer.
Here’s an example of using the round()
function:
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rounded_number = round(3.14159265, 2) print(rounded_number) |
This code will output:
3.14
As you can see, the number 3.14159265
was rounded to 2 decimal places, which resulted in 3.14
.
Step 2: Round to the nearest tenth
In this step, we will focus on rounding to the nearest tenth, which means that the number will be rounded to 1 decimal place. To achieve this, we simply need to use the round()
function with ndigits
set to 1:
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number = 5.6789 rounded_to_tenth = round(number, 1) print(rounded_to_tenth) |
The output of this code is:
5.7
The number 5.6789
was rounded to the nearest tenth, resulting in 5.7
.
Step 3: Rounding a list of numbers
In some scenarios, you may need to round a list of numbers to the nearest tenth. This can be done using a for loop or a list comprehension in Python. Below are examples of both methods.
Using a for loop:
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numbers = [5.6789, 3.1415, 2.7183] rounded_numbers = [] for num in numbers: rounded_numbers.append(round(num, 1)) print(rounded_numbers) |
Using list comprehension:
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numbers = [5.6789, 3.1415, 2.7183] rounded_numbers = [round(num, 1) for num in numbers] print(rounded_numbers) |
Both of these code snippets will output:
[5.7, 3.1, 2.7]
Full code
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number = 5.6789 rounded_to_tenth = round(number, 1) print(rounded_to_tenth) numbers = [5.6789, 3.1415, 2.7183] rounded_numbers = [] for num in numbers: rounded_numbers.append(round(num, 1)) print(rounded_numbers) rounded_numbers_lc = [round(num, 1) for num in numbers] print(rounded_numbers_lc) |
Conclusion
In this tutorial, we discovered how to round to the nearest tenth in Python using the built-in round()
function. We also demonstrated how to round a list of numbers to the nearest tenth using either a for loop or list comprehension. The round()
function makes it easy and intuitive to round numbers to any desired decimal places.