How to convert int to str in python

Convert Integer to String in Python

The best method to convert an integer to a string is to use the Python str() function. However, there are other methods as well, which we will discuss in this article with examples. Type conversion is most used in any programming language.

1. Quick Examples of Converting Integer to String

These examples will give you a high-level idea of how to convert an integer to a string. Later on, we will discuss each of these methods in detail.

 # Quick Examples of Converting Integer to String # Method 1: The str() function num = 465 str_num = str(num) # Method 2: Recursion def int_to_str(num): if num < 0: return '-' + int_to_str(-num) elif num < 10: return chr(ord('0') + num) else: return int_to_str(num // 10) + int_to_str(num % 10) str_num = int_to_str(num) print(str_num) # Method 3: String formatting str_num = "%d" % num # Method 4: f-strings str_num = f"" # Method 5: The format() method str_num = "<>".format(num) 

2. Use str() to Convert Integer to String in Python

The str() function is used to convert Integer to String in Python, actually this method can be used to convert any object to a string representation. When you use this method with an integer argument, it will return a string representation of the integer. The syntax for using str() to convert an integer to a string is simple:

 # Using str() str_num = str(integer) 

 # Convert an Integer to a String num = 465 str_num = str(num) print(str_num) # Output: # "465" 

3. chr() to Convert Integer to String

In Python, the chr() function also returns the string representing a character whose Unicode code point is the integer passed to it. We can use this function to convert an integer to a string by first adding the integer to the ASCII code of the character ‘0’, which gives us the ASCII code of the character representing the digit. We can then pass this ASCII code to the chr() function to get the corresponding character.

I am considering this method a classic and traditional, and not reommanded to use this method for just doing the normal conversion of an integer to a string.

 # Function using traditional method. def int_to_str(num): str_num = "" for d in str(num): str_num += chr(ord('0') + int(d)) return str_num # Example num = 345 str_num = int_to_str(num) print(str_num) # Output: "345" 

4. String Formatting

Python provides the % operator for string formatting, which you can use to convert an integer to a string by specifying the integer as part of a format string.

 # Integer to string using string formatting num = 231 str_num = "%d" % num print(str_num) # Output: # "231" 

We use the % operator to format the string «%d» , which specifies that the argument should be formatted as an integer. We then pass the integer num as an argument to the % operator to get the resulting string.

5. f-strings – int to str Conversion

F-strings are a newer feature in Python 3 that provides a concise and readable way to format strings. We can use f-strings to convert an integer to a string by including the integer as part of the f-string.

 # F-String method num = 342 str_num = f"" print(str_num) # Output: # "342" 

We can also specify a format specifier inside the curly braces to control how the integer is formatted, similar to the format() method:

 # Conversoin from int to str num = 123 str_num = f"" print(str_num) # Output: # "00123" 

6. format() – Conversion of Integer to String

This is just another way of formatting string. However we can use it to convert an integer to a string by specifying the integer as an argument to the method.

 # Using the format() function str_num = "<>".format(num) print(str_num) # Output: # "123" 

Just like the f-string we can also specify a format specifier inside the placeholder to control how the integer is formatted:

 # Using the format() function str_num = "".format(num) print(str_num) # Output: # "00123" 

We include the format specifier :05d inside the placeholder, which specifies that the integer should be zero-padded to 5 digits. The resulting string is «00123» .

7. Summary and Conclusion

In this article, you have learned how to convert an integer to string in Python. We have discussed different methods like str() and chr() , string formatting e.t.c. Since, there are more than one way to solve a problem, you need to choose the best once that fits for your need.

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Как преобразовать целое число в строку в Python [Python Convert Int To String]

В этом руководстве по Python мы обсудим, как преобразовать целое число в строку в Python. Преобразование целых чисел в строки — распространенная задача программирования, и Python предоставляет несколько встроенных функций и методов для достижения этой цели.

Чтобы преобразовать целое число в строку в Python, вы можете использовать различные методы, подобные приведенным ниже:

1. Использование функции ул()
2. Использование f-строк (форматированные строковые литералы)
3. Использование метода формат()
4. Использование %-форматирования (форматирование строки в стиле printf)

Преобразование целого числа в строку в Python

Теперь давайте проверим различные методы преобразования целого числа в строку в Python на различных примерах.

1. Использование функции str()

Функция str() — это встроенная функция Python, которая преобразует свой аргумент в строковое представление.

number = 42 string_number = str(number) print(string_number) print(type(string_number))

2. Использование f-строк (форматированные строковые литералы)

F-строки, также известные как форматированные строковые литералы, появились в Python 3.6. Они позволяют встраивать выражения в строковые литералы с помощью фигурных скобок <>.

number = 42 string_number = f"" print(string_number) print(type(string_number))

3. Использование метода format()

Метод format() — это еще один способ форматирования строк в Python. Он позволяет заменять заполнители, определенные фигурными скобками <>, значениями переменных, переданных в качестве аргументов.

number = 42 string_number = "<>".format(number) print(string_number) print(type(string_number))

4. Использование %-форматирования

Форматирование % — это более старый метод форматирования строк, вдохновленный стилем printf в C. Он использует оператор %, за которым следует спецификатор формата для определения преобразования между типами данных.

number = 42 string_number = "%d" % number print(string_number) print(type(string_number))

Заключение

В этом уроке мы изучили четыре различных метода преобразовать целое число в строку в Python:

1. Использование функции ул()
2. Использование f-строк
3. Использование метода формат()
4. Использование %-форматирования

Все эти методы действительны и могут использоваться взаимозаменяемо, в зависимости от ваших предпочтений и версии Python, с которой вы работаете. F-строки и функция str() являются наиболее современными и рекомендуемыми способами преобразования целых чисел в строки в Python.

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4 Ways to Convert Int to String in Python

While programming in python, many operations require typecasting of data and variables from one data type to another. These conversions are sometimes made by interpreters internally while running the program. But often interpreter also fails to perform the type conversion of data type, so the programmer has to perform explicit type conversion using some default methods. Today, let us understand the conversion of Int to String in python using 4 different methods in detail, along with the example and output. But before that, take a look at a brief introduction to integer and strings in python for better understanding.

What is Integer in Python?

Int or integer in python is a whole number, either positive or negative, but without decimal points. Integers have lengths up to the memory limit of a computer, and therefore, you may never run out of integers that you can use while programming in python. By default, int is decimal, i.e., base 10, but you can also define them or use them with different bases. All integer literals or variables are the objects of the “int” class. You can use the “type()” method to identify the class name of the variable in python.

For Example

What are Strings in Python?

In python, the string is a sequence of characters wrapped around single or double quotes. You can use triple quotes to create a multi-line string in python. It is immutable in nature, which means the strings, once defined, cannot be changed again. As python does not support character data type, a single character is considered a string of length 1. There are many string manipulation methods available to perform different operations on a string. For example, join, concatenation, append, trim, etc.

These methods are not directly applied to the original string because of their immutable nature. Therefore, a copy of the original string is created, and operations are performed on it. You can use square brackets to access the element of the string using their index number.

For Example

a = 'favtutor' print(type(a)) print(a)

Convert Int to String in Python

There are total four methods by which you can convert the integer data type into string in python. Let us study all these methods in detail below:

1) Using str() function

str() is a built-in function in python programming used to convert the integer into a string. Apart from integer conversion, the str() function can take any python data type as a parameter and convert it into the string format. Take a look at the example below for a better understanding.

For Example

a = 10 print(type(a)) # converting int into string convert_a = str(a) print(type(convert_a))

2) Using string formatting

String formatting is one of the methods to insert a variable or another string into a predefined string. But apart from this, you can also use string formatting to convert an integer to a string. The “%s” keyword is used to convert int into a string. The empty string is created, and the “%s” operator is placed in it. Later, the integer which is to be converted into the string is defined. During the program execution, the interpreter will convert the int into a string as shown in the below given example:

For Example

a = 10 print(type(a)) # converting int into string convert_a = "% s" % a print(type(convert_a))

3) Using format() method

Just like the “%s” operator, you can also make use of the format() method to convert int into strings in python programming. For this method to work, you have to insert the <> placeholder in the empty string created. Later, you can call the format() method on the empty string with the integer to be converted. The below example shows the clear working of format() method for conversion of integer to string.

For Example

a = 10 print(type(a)) # converting int into string convert_a = "<>".format(a) print(type(convert_a))

4) Using F-strings

In python, F strings are used to embed a value or an expression into a string. But along with this, it is also used in the conversion of integers into strings. The syntax for F-strings is similar to that if format() method. The only difference between them is that you have to insert the variables directly into the placeholder while working with F-strings. This will make the code more clean and readable. Check out the below example for a better understanding.

For Example

a = 10 print(type(a)) # converting int into string convert_a = f'' print(type(convert_a))

Conclusion

Great work! You’ve learned so much about the integer, strings, and different methods used to convert an integer (Int) to string in python. These methods include the use of the str() method, “%s” operator, format() method, and F-strings to convert the int to string explicitly. While programming in python, there are situations where it is necessary to perform the type conversions. Therefore, these methods will give effective and faster outputs for conversion of int to string data type.

To learn more about type conversion in python, refer to our article defining 6 different ways to convert string to float.

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