Python Integer-to-String Conversion

In any programming language, the ability to use and manipulate strings is fundamental. This entails being able to transform non-string data, such as integers or floats, into strings. It is possible that you will need to output or store a string that includes some recently updated information that is currently stored in an integer variable.  

The string may keep track of the total number of new users who signed up for a website on a given day, the total number of kilowatt hours consumed so far this month, etc. The knowledge of conversion methods presented here will prove useful in such circumstances.

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Here are the topics we'll discuss in this article:

  • Python's Integer to String Conversion Guide
  • Concatenating a String and an Integer: a Concrete Illustration
  • Linking Character Strings and Numeric Values Without Conversions
  • Python Integer to String Conversion Interview Questions
  • Common Questions About Python's Integer-to-String Conversion

What is the Python Way to Convert an Integer to a String?

Python provides many built-in methods for converting numbers to strings. Keep in mind that type coercion and implicit conversions are not supported in Python, so we must perform these actions manually. First, we'll investigate several Pythonic approaches to making the Integer-to-String conversion. When converting data, we'll use the type() function to make sure we're converting to the right format.

Using the str() Method

The Python str() built-in function uses the __str__() method to transform an object into a String. While special methods of the form __x__() are permitted, it is recommended that you use __str__() instead. There are three arguments to str():

  • Object: The object that will be serialized. So long as we're talking about it, consider it an int object. Python, however, will not throw an error if the object passed in is neither an integer nor a string. Also, str() will only return an empty string if no object is supplied as a parameter.
  • Parameter mentioning the object's encoding type, as shown in the syntax below UTF-8 is the defacto standard encoding. If it is not necessary, you can omit this information.
  • In the event of an error during encoding, this parameter specifies the appropriate action to take. If special handling of error conditions is not required, you can omit this information.

To better understand the format, here is the syntax:

This can be written as: str(object, encoding=encoding, errors=errors).

Allow me to illustrate with an example:

The value of int_to_convert is 10.

the int_to_convert variable's type is printed out at this point (#)



# transforming int_to_convert into a string

string(int_to_convert) = int_converted_via_str

Integer to string conversion: # verifying int_converted_via_str type






Through the Use of the "%s" Keyword

Using the %s keyword, we can also perform this integer-to-string conversion. In order to replace "%s" in a string, this method first casts the object type to a string. It can also be used to embed a string within another string.  


for 10 in int_to_convert

# This code demonstrates how to transform an int value into a string.

# and will substitute the passed string for all occurrences of "%s"

# confirming int_to_convert's type



# Stringification of the integer int_to_convert

int_to_convert = "%s"% int_converted_via_s





By Using The format() Method

Python's format function is yet another option for turning numbers into strings. In order to format a given number, the format function requires two pieces of information: the number itself, and the rules for formatting it.  

Insert your desired value(s) into the blanks provided in this format specification. Check out our page, Python Format Function, for additional details about the format function.

This code demonstrates how to use Python's format() function to convert an integer to a string.

an_int_to_float = 10

# Verifying int_to_convert's data type



# Using format to convert int to string

formatted_integer = "" format(int_to_convert)  





The f-string technique

F-string is the last option on our list for converting integers to strings in Python 3. Python's f-string is a literal string that begins with the prefix f and stores expressions within braces, allowing for the embedding of expressions within strings with minimal syntax. Take into account that f-string is not compatible with Python versions prior to 3. Python 2 does not support this feature. So, to break it down,

Integer to decimal conversion value: 10

# verifying int_to_convert's data type



Putting int_to_convert into string format #

f'int_to_convert' = int_converted_via_fstring

Displaying the int_converted_via_fstring type





Concatenating a String and an Integer: an Example

Here's an example of using the str() function to convert an integer into a string, then concatenating that string with another string. This is helpful when we need to combine the contents of a string and an integer variable for output.  

concatenate_integers = 7

converted_int_to_concatenate = str(7)

# Joining the string using int_to_concatenate's string representation

print("A week has " int_to_concatenate_converted " days ")

If no argument is given, # return an empty string



Each week has seven successive days.

Integrating Numeric and Character Data Without Conversions

Instead of using str() to join strings together, you can take advantage of the format function or—even better—the brand-new f-strings feature in Python 3.

With these two instruments, we can accomplish the same thing:

The Format Function Concatenation

concatenate_integers = 7

# Joins items using format function, without converting

print("There are x days in a week") " format(x=int_to_concatenate))


Every week has 7 days.

A Function for Concatenating F-Strings

a 7-digit int is needed to concatenate it. int_to_concatenate

# Joins strings together with the f-string function, without converting them.

int_to_concatenate> is the number of days in a week; print (f"A week has int_ ")


There are 7 days in a week.

Integer to String Conversion in Python: Job-Seeker Interview Questions

Some questions on technical interviews may ask how to turn an integer into a string, as shown below.

  1. Without resorting to any techniques that would make the solution obvious, write a function that accepts an integer and returns the string representation of that integer.
  2. Single-step String-to-Integer and Integer-to-String conversion
  3. Replace integer values with hexadecimal ones
  4. What are the various Python methods for transforming integers into strings?
  5. How can you combine strings and numbers without resorting to conversions?

Python Integer to String Conversion Frequently Asked Questions

When using the format function, how do I combine multiple integers into one concatenated string?

Here's an example using the format function with several placeholders, but any of the four approaches above will do the trick.

Putting it into syntactic terms: value_a, value_b, value_c)


The expression str_one = "String with multiple placeholders" "

formatted_str_one = str_formatted to format(5, 6, 7)



Five-position string with six blanks, seven

When would we need to perform an int-to-string conversion?

The following are some situations where it would be helpful to convert an integer to a string:

  • When two or more numbers are joined together
  • Examining a big number for the presence of a specific digit
  • To display an integer as textual content elaborating on the meaning of the number

Question 3: In what circumstances would we need to perform the inverse conversion, from a string to an integer? Where can I find the Python code to parse a string into an integer?

If the input is an integer read as a string, we typically need to convert the string to an integer before using it in a numerical operation. The int() function's print(int("String")) syntax can be used to effect this transformation.

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