Python3 int to str

1. Introduction

In Python, we often need to convert an integer to a string for various purposes, such as displaying the number as part of a text, storing it in a database, or performing string operations on it. Thankfully, Python provides an easy way to convert an integer to a string using the str() function.

This article will explain how to convert an integer to a string in Python3, along with code examples and explanations.

2. Converting int to str using str()

To convert an integer to a string in Python3, we can use the str() function. This function takes an object as input and returns a string representation of that object.

Here's an example that demonstrates converting an integer to a string using str():

# Converting an integer to a string
num = 42
num_str = str(num)

# Printing the result
print("Integer:", num)
print("String:", num_str)

Output:

Integer: 42
String: 42

As you can see, the str() function converts the integer 42 to the string "42". It's important to note that the resulting string is not just the visual representation of the number, but an actual string object.

3. Other Ways to Convert int to str

Apart from using the str() function, there are other ways to convert an integer to a string in Python3.

3.1 Using the format() method

The format() method is another way to convert an integer to a string. This method allows us to format the string representation of the integer by specifying formatting options.

Here's an example that demonstrates converting an integer to a string using the format() method:

# Converting an integer to a string using format()
num = 42
num_str = "{:d}".format(num)

# Printing the result
print("Integer:", num)
print("String:", num_str)

Output:

Integer: 42
String: 42

In this example, we use the {:d} format specifier to convert the integer to a string. The d stands for decimal, indicating that we want to represent the number as a decimal string.

3.2 Using f-strings

Introduced in Python 3.6, f-strings provide a concise and efficient way to format strings. They allow us to embed expressions inside string literals, including converting integers to strings.

Here's an example that demonstrates converting an integer to a string using f-strings:

# Converting an integer to a string using f-strings
num = 42
num_str = f"{num}"

# Printing the result
print("Integer:", num)
print("String:", num_str)

Output:

Integer: 42
String: 42

In this example, we use the f-string {num} to convert the integer to a string. The expression within the curly braces is evaluated and its result is inserted into the string.

4. Conclusion

In Python3, converting an integer to a string is a straightforward task. We can use the str() function, the format() method, or f-strings to achieve this.

Here's a summary of the methods discussed in this article:

  • Using str(): num_str = str(num)
  • Using format(): num_str = "{:d}".format(num)
  • Using f-strings: num_str = f"{num}"

These methods provide flexibility and convenience when working with integers and strings in Python3. Remember to choose the method that suits your specific requirements and coding style.


Class Diagram:

classDiagram
    class Integer {
        +value : int
        +__str__() : str
    }
    class String {
        +value : str
        +__add__(other: str) : str
        +__len__() : int
    }
    Integer --> String

Flowchart:

flowchart TD
    Start --> Convert
    Convert --> |Method 1: str()| UsingStr
    Convert --> |Method 2: format()| UsingFormat
    Convert --> |Method 3: f-strings| UsingFstrings
    UsingStr --> Display
    UsingFormat --> Display
    UsingFstrings --> Display
    Display --> End

By following the methods explained in this article, you can easily convert an integer to a string in Python3. Understanding these conversion techniques is essential for performing various string operations and formatting tasks in Python.