You can use the zfill() method to pad a string with zeros:
In [3]: str(1).zfill(2)
Out[3]: '01'
Top answer 1 of 10
878
You can use the zfill() method to pad a string with zeros:
In [3]: str(1).zfill(2)
Out[3]: '01'
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283
The standard way is to use format string modifiers. These format string methods are available in most programming languages (via the sprintf function in c for example) and are a handy tool to know about.
To output a string of length 5:
... in Python 3.5 and above: f-strings.
i = random.randint(0, 99999)
print(f'{i:05d}')
Search for f-strings here for more details.
... Python 2.6 and above:
print '{0:05d}'.format(i)
... before Python 2.6:
print "%05d" % i
See: https://docs.python.org/3/library/string.html
Finxter
blog.finxter.com › home › learn python blog › python int to string with leading zeros
Python Int to String with Leading Zeros - Be on the Right Side of Change
September 27, 2023 - To convert an integer i to a string with leading zeros so that it consists of 5 characters, use the format string f'{i:05d}'. The d flag in this expression defines that the result is a decimal value.
python - Display number with leading zeros - Stack Overflow
How do I display a leading zero for all numbers with less than two digits? 1 → 01 10 → 10 100 → 100 More on stackoverflow.com
How would you add zeros to the beginning of an Integer, such that there are 4 total digits in the number?
zfill or format are not obscure at all. A python integer cannot have leading zeros. It's simply not possible. zfill and format work with strings. You can also use f-strings to add zeros to a string: data = 15 print(f"{data:0>4}") That said this sounds like an XY problem. We could help a lot more if you told us what problem you are trying to solve, not just how you are trying to solve it. What's the big picture here? http://xyproblem.info More on reddit.com
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February 16, 2022How to convert int with more zero digits to string in python? - Stack Overflow
While i was participating in an online python competition i got stuck in a small operation, the thing is that, i need to convert an integer 0000 to a string. but by using str(0000) will give only '... More on stackoverflow.com
Strange behavior: leading zeros in formatted print function are reversed
It's because m is the string '4' not the integer 4. The default for strings is left align, the default for integers is right align. You can either convert m and d to integers m = int(m) d = int(m) or you can specify the alignment direction explicitly print(f"{y}-{m:>02}-{d:>02}") More on reddit.com
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September 3, 202400:55
How To Add Leading Zeros In Python Using FStrings - YouTube
02:29
Python 75: Adding leading zeros to an integer using the format() ...
02:35
Best way to format integer as string with leading zeros? - YouTube
01:08
Mastering String Formatting in Python: Adding Leading Zeros - YouTube
03:11
how to keep leading zeros in python - YouTube
- YouTube
Bobby Hadz
bobbyhadz.com › blog › python-add-leading-zeros-to-number
How to add leading Zeros to a Number in Python | bobbyhadz
Use the str() class to convert the number to a string. Use the str.zfill() method to add leading zeros to the string.
TutorialsPoint
tutorialspoint.com › article › how-to-add-leading-zeros-to-a-number-in-python
How to Add Leading Zeros to a Number in Python?
March 27, 2026 - number = 50 desired_width = 5 # Convert number to string and use zfill method number_str = str(number).zfill(desired_width) print("Number after leading zeros:", number_str) ... The rjust() method rightjustifies a string and fills the remaining ...
AskPython
askpython.com › python › examples › display-numbers-with-leading-zeros
How to Display Numbers with Leading Zeros in Python? - AskPython
March 26, 2023 - To add leading zeros to numbers in Python, you can use the format() function, f-string technique, rjust() function, or zfill() function.
Top answer 1 of 16
2006
In Python 2 (and Python 3) you can do:
number = 1
print("%02d" % (number,))
Basically % is like printf or sprintf (see docs).
For Python 3.+, the same behavior can also be achieved with format:
number = 1
print("{:02d}".format(number))
For Python 3.6+ the same behavior can be achieved with f-strings:
number = 1
print(f"{number:02d}")
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You can use str.zfill:
print(str(1).zfill(2))
print(str(10).zfill(2))
print(str(100).zfill(2))
prints:
01
10
100
GeeksforGeeks
geeksforgeeks.org › how-to-add-leading-zeros-to-a-number-in-python
How to Add leading Zeros to a Number in Python - GeeksforGeeks
March 24, 2023 - In Python, When it comes to data manipulation and data analysis, Panda is a powerful library that provides capabilities to easily encounter scenarios where the conversion of integer to string with leading zeros is needed. In this article, we will discuss How we can convert pandas int to string with
Theprogrammingexpert
theprogrammingexpert.com › python-int-to-string-with-leading-zeros
Using Python to Convert Integer to String with Leading Zeros
July 13, 2022 - To convert an integer to a string with leading zeros in Python, the easiest way is with the str() function and + operator.
pythontutorials
pythontutorials.net › blog › in-python-how-to-specify-a-format-when-converting-int-to-string
How to Convert Int to String with Leading Zeros for Fixed Length in Python — pythontutorials.net
F-strings (formatted string literals) are a concise and readable way to format strings in Python 3.6+. They support format specifiers to control padding, including leading zeros for fixed-length integers.
Quora
quora.com › How-do-you-print-an-integer-with-leading-zeros-in-Python
How to print an integer with leading zeros in Python - Quora
Answer (1 of 3): You can use the Python zfill(n) function which facilitates the printing of an integer with leading zeroes. However, the integer must be converted to a string, and the total number of characters printed will be up to n, but not less than the number of digits in the given integer. ...
Reddit
reddit.com › r/learnpython › how would you add zeros to the beginning of an integer, such that there are 4 total digits in the number?
r/learnpython on Reddit: How would you add zeros to the beginning of an Integer, such that there are 4 total digits in the number?
February 16, 2022 -
Without using zfill or format or any other obscure functions.
example:
turn 15 into 0015
or 234 into 0234
Top answer 1 of 2
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zfill or format are not obscure at all. A python integer cannot have leading zeros. It's simply not possible. zfill and format work with strings. You can also use f-strings to add zeros to a string: data = 15 print(f"{data:0>4}") That said this sounds like an XY problem. We could help a lot more if you told us what problem you are trying to solve, not just how you are trying to solve it. What's the big picture here? http://xyproblem.info
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This can work: f=lambda n: '0'*(4-len(str(n)))+str(n) f(15)='0015' Basically, just convert to string, find the length, and use that to calculate the number of zeros required. Then use '0'*n to generate that number of zeroes and slap the original number on the end.
GeeksforGeeks
geeksforgeeks.org › python › python-pandas-int-to-string-with-leading-zeros
Python | pandas int to string with leading zeros - GeeksforGeeks
July 23, 2025 - You can use pandas Series .map() and Python's string formatting to convert integers to strings with the leading zeros.
Medium
medium.com › vicipyweb3 › mastering-leading-zero-magic-a-friendly-guide-to-formatting-leading-zeros-in-python-3cb934d7aa4f
Mastering Leading Zero Magic: A Friendly Guide to Formatting Leading Zeros in Python | by PythonistaSage | ViciPyWeb3 | Medium
May 3, 2023 - The str.zfill() method is a string method that pads a numeric string with leading zeros until it reaches the specified width. This method offers a straightforward way to handle leading zeros in Python.
Python Guides
pythonguides.com › convert-int-to-string-in-python
Convert Integer to String in Python (5 Easy Ways)
3 weeks ago - Convert an integer to a string in Python with str(), f-strings and format(), plus leading zeros, commas, hex, lists of ints and the 4,300-digit limit.
Top answer 1 of 2
1
Pad your string.
print('{:0>4}'.format(str(1)))
prints 0001 while
print('{:0>4}'.format(str(123456)))
prints 123456.
You can check https://pyformat.info for more info on .format().
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In the example by Jonathan, 0045 becomes 37 because 0045 is considered as octal by the interpreter. 4*8+5=37. Usually in cases like this, we will not start with leading zeroes. we will start with 45. Hence the answer will be consistent. leading zeroes in string form provide a way for the interpreter to understand octal representation. Hope this helps.
Codecademy
codecademy.com › docs › python › strings › .zfill()
Python | Strings | .zfill() | Codecademy
November 19, 2023 - Returns a string with zeros padding the left side based on the integer given.
Stack Abuse
stackabuse.com › bytes › add-leading-zeros-to-a-number-in-python
Add Leading Zeros to a Number in Python
July 2, 2022 - Note that if you're zero padding an integer (and not a string, like in the previous examples), you'll need to first convert the integer to a string: ... If you're using Python 3, you can use the f-string syntax to zero pad your strings.
w3resource
w3resource.com › python-exercises › python-basic-exercise-140.php › 1000
Python: Convert an integer to binary keep leading zeros - w3resource
May 17, 2025 - Converting an integer to an n-bit binary number results in its binary representation containing leading zeros up to length n. For example, to convert the integer 5 to a 6-bit binary results in 000101. format(num, name) function with name as "0nb" to ...
Linuxize
linuxize.com › home › python › how to convert integer into string in python
How to Convert Integer into String in Python | Linuxize
1 month ago - Convert an int to a str in Python with str(), f-strings, and format(), add leading zeros, build binary or hex strings, and join a list of numbers.
Ashutosh Writes
blog.ashutoshkrris.in › how-to-display-numbers-with-leading-zeros-using-python
How to display numbers with leading zeros using Python?
March 18, 2023 - Storing and displaying numbers with leading zeros is a crucial aspect as it significantly helps in accurately converting a number from one number system to another. In this blog, we'll see various ways to display numbers with leading zeros in Python. ... The str.zfill(width) function is used to return the numeric string with zeros automatically filled at the left side of the number of the given width.