numbers = [23.23, 0.1233, 1.0, 4.223, 9887.2]
for x in numbers:
print("{:10.4f}".format(x))
prints
23.2300
0.1233
1.0000
4.2230
9887.2000
The format specifier inside the curly braces follows the Python format string syntax. Specifically, in this case, it consists of the following parts:
- The empty string before the colon means "take the next provided argument to
format()" – in this case thexas the only argument. - The
10.4fpart after the colon is the format specification. - The
fdenotes fixed-point notation. - The
10is the total width of the field being printed, lefted-padded by spaces. - The
4is the number of digits after the decimal point.
Real Python
realpython.com › how-to-python-f-string-format-float
How to Format Floats Within F-Strings in Python – Real Python
March 18, 2026 - In its most basic form, this allows you to define the precision, or number of decimal places, the float will be displayed with. The code below displays the same calculation as before, only it’s displayed more neatly: ... >>> f"One third, rounded to two decimal places is: {1 / 3:.2f}" 'One third, rounded to two decimal places is: 0.33' To use Python’s format specifiers in a replacement field, you separate them from the expression with a colon (:).
Python.org
discuss.python.org › ideas
New format specifiers for string formatting of floats with SI and IEC prefixes - Ideas - Discussions on Python.org
May 19, 2023 - I was thinking of writing a PEP to support formatting floats with SI (decimal) and IEC (binary) prefixes natively for float (and maybe other types if makes sense) but wanted to feel it out first. I’ve implemented what I want to propose in the Prefixed package as a subclass of float.
Do you normally use string.format() or percentage (%) to format your Python strings?
Firstly, you can write e. g. {0:.2f} to specify a float with 2 decimals, see e. g. https://www.digitalocean.com/community/tutorials/how-to-use-string-formatters-in-python-3
Secondly, the best formatting method is f-strings, see e. g. https://www.blog.pythonlibrary.org/2018/03/13/python-3-an-intro-to-f-strings/
More on reddit.com 130
75
June 3, 2018How to use the float() command to create 2 decimal places instead of one in a product of 2 numbers [the product is dollar amount]
You generally don't round until you go to display the value. You can use round for that, but since you just want to display it with two digits, you can use string formatting . In your case, something like print(f'{totalPay:.2f}'). .2f is the format specifier, saying round the float (f) to two decimal places (.2). More on reddit.com
9
7
January 28, 2020Does .2f change the original float?
No. Formatting returns text, and the original float stays unchanged unless your code assigns a different value.
askpython.com
askpython.com › python › string › python-floating-point-formatting
Python .2f: Format Floats to Two Decimal Places - AskPython
What does .2f mean in Python?
The .2f format specifier displays a number in fixed-point notation with two digits after the decimal point. Its result is a string.
askpython.com
askpython.com › python › string › python-floating-point-formatting
Python .2f: Format Floats to Two Decimal Places - AskPython
Does .2f round or truncate?
It rounds the displayed value to the requested precision rather than cutting off later digits. The result still depends on the value Python stores.
askpython.com
askpython.com › python › string › python-floating-point-formatting
Python .2f: Format Floats to Two Decimal Places - AskPython
19:43
How to Format and Round Floating-Point Numbers (Float) Using ...
13:08
Formatting Floats Inside Python F-Strings: Rounding & Percentages ...
07:28
Using F-Strings to Format and Round Floats (Video) – Real Python
Formatting your floats in Python - YouTube
Using Format Specifiers with Format Method in Python - YouTube
05:21
Learn Python format specifiers in 5 minutes! 💬 - YouTube
Medium
medium.com › @coucoucamille › float-formatting-in-python-ccb023b86417
Simple Float Formatting in Python | by Coucou Camille | Medium
June 15, 2022 - Python’s built-in format() function allows you to format float in any way you prefer. Syntax: {:.2f}.format(num) for rounding to 2 decimal places. {} marks a replacement field · : introduces a format specifier · .2 specify the precision as 2, or any other number ·
Top answer 1 of 14
730
numbers = [23.23, 0.1233, 1.0, 4.223, 9887.2]
for x in numbers:
print("{:10.4f}".format(x))
prints
23.2300
0.1233
1.0000
4.2230
9887.2000
The format specifier inside the curly braces follows the Python format string syntax. Specifically, in this case, it consists of the following parts:
- The empty string before the colon means "take the next provided argument to
format()" – in this case thexas the only argument. - The
10.4fpart after the colon is the format specification. - The
fdenotes fixed-point notation. - The
10is the total width of the field being printed, lefted-padded by spaces. - The
4is the number of digits after the decimal point.
2 of 14
258
It has been a few years since this was answered, but as of Python 3.6 (PEP498) you could use the new f-strings:
numbers = [23.23, 0.123334987, 1, 4.223, 9887.2]
for number in numbers:
print(f'{number:9.4f}')
Prints:
23.2300
0.1233
1.0000
4.2230
9887.2000
AskPython
askpython.com › python › string › python-floating-point-formatting
Python .2f: Format Floats to Two Decimal Places - AskPython
1 week ago - In Python, .2f formats a number as fixed-point text with two digits after the decimal point. The colon starts the format specification, 2 sets the precision, and f selects fixed-point presentation.
GeeksforGeeks
geeksforgeeks.org › python › string-formatting-in-python
String Formatting in Python - GeeksforGeeks
The %5.4f format specifier is used to format a floating-point number with a minimum width of 5 and a precision of 4 decimal places. ... In the given code, the formatting string Python is converted to Integer and floating point with %d,%f.
Published: March 18, 2026
CodeRivers
coderivers.org › blog › python-format-specifier
Python Format Specifier: A Comprehensive Guide - CodeRivers
February 22, 2026 - For example, f - strings were introduced in Python 3.6. If you need to support older versions, use the format method instead. When using format specifiers, make sure to handle potential errors. For example, if you expect a certain data type in a format specifier but receive a different type, it can lead to errors. try: value = "not a number" formatted_value = "{:.2f}".format(float(value)) except ValueError as e: print(f"Error: {e}")
PW Skills
pwskills.com › blog › 2f-in-python-what-does-it-mean
What Does %.2f Mean in Python?
In Python, “2f” refers to the formatting directive used to display a floating-point number with two digits after the decimal. It is usually written as part of a larger format specifier like “%.2f” or “{:.2f}”, where the “2f” ...
Python
peps.python.org › pep-3101
PEP 3101 – Advanced String Formatting | peps.python.org
So for example, in the case where the ‘int’ formatter sees a format type of ‘f’ (meaning ‘float’) it can simply cast the value to a float and call format() again. Any class can override the __format__ method to provide custom formatting ...
Appdividend
appdividend.com › how-to-format-float-values-in-python
How to Format Float Values in Python
December 13, 2025 - To format float values in Python, use the format() method or f-strings or just format the value using %.2f inside the print() method.
Finxter
blog.finxter.com › python-format-function
Python format() Function: No-BS Guide by Example – Be on the Right Side of Change
February 5, 2021 - The 'f' format specifier simply stands for the formatting objective 'float'.
Python Reference
python-reference.readthedocs.io › en › latest › docs › functions › format.html
format — Python Reference (The Right Way) 0.1 documentation
If not specified, then the field width will be determined by the content. Preceding the width field by a zero (‘0’) character enables sign-aware zero-padding for numeric types. This is equivalent to a fill character of ‘0’ with an alignment type of ‘=’. The precision is a decimal number indicating how many digits should be displayed after the decimal point for a floating point value formatted with ‘f’ and ‘F’, or before and after the decimal point for a floating point value formatted with ‘g’ or ‘G’. For non-number types the field indicates the maximum field size - in other words, how many characters will be used from the field content.
freeCodeCamp
freecodecamp.org › news › 2f-in-python-what-does-it-mean
%.2f in Python – What does it Mean?
June 22, 2022 - The %f formatter is specifically used for formatting float values (numbers with decimals). We can use the %f formatter to specify the number of decimal numbers to be returned when a fl...
University of Vermont
uvm.edu › ~cbcafier › cs1210 › book › 07_console_io › printing.html
Formatting and printing output – Clayton Cafiero
Fortunately, we can tell Python how many decimal places we wish to use. We can include a format specifier within our f-string. ... The syntax for this is to follow the interpolated element with a colon : and then a specifier for the desired format. In the example above, we used .2f meaning “display as a floating-point number to two decimal places precision”. Notice what happens here:
py4u
py4u.org › blog › python-precision-in-string-formatting-with-float-numbers
Python Float String Formatting: How to Preserve Full Precision Without Manual Decimal Specification
For 64-bit floats (the default in Python), it returns up to 17 significant digits—the minimum needed to uniquely identify the float. Use case: Debugging, logging, or any scenario where you need to reconstruct the exact float later. Caveat: repr() output can be verbose (e.g., repr(1000000.0) → '1000000.0' instead of '1000000'). The 'g' (general) format specifier removes insignificant trailing zeros and uses exponential notation for small/large numbers.
LabEx
labex.io › tutorials › python-how-to-format-the-output-of-floating-point-numbers-in-python-397681
How to format the output of floating-point numbers in Python | LabEx
These techniques can be particularly useful when dealing with large or small numbers, or when you need to control the overall appearance of the output. To display a floating-point number in scientific notation, you can use the e or E format ...
LabEx
labex.io › questions › how-to-use-format-specifiers-in-python-91
How to Use Format Specifiers in Python | LabEx
July 25, 2024 - Some of the most common ones include: ... Numeric Format Specifiers: Integer: {:d} or {:n} Floating-Point: {:f}, {:.nf} (where n is the number of decimal places) Percentage: {:.n%} (where n is the number of decimal places) String ...
AskPython
askpython.com › python › string › print-format-3f
Understanding the Print Format %.3f in Python - AskPython
March 30, 2023 - In Python, the “%.3f” format specifier is a method for formatting floating-point numbers to display only three decimal places. This is achieved using the ‘%’ operator along with the ‘%.nf’ format specifier, where ‘n’ determines the number of decimal places.
PyFormat
pyformat.info
PyFormat: Using % and .format() for great good!
The number behind a . in the format specifies the precision of the output. For strings that means that the output is truncated to the specified length.
University of Southampton
southampton.ac.uk › ~fangohr › teaching › python › book › html › 05-input-output.html
05-input-output
The format specifier of type %W.Df means that a Float should be printed with a total Width of W characters and D digits behind the Decimal point.