Concatenate a String with Numbers in Python

Concatenation is nothing but the process of joining two or more strings together. In Python, if one value is a number (integer or float), we can't directly concatenate it with a string using the '+' operator, as it raises a TypeError.

Python does not allow the implicit conversion between strings and numbers during the concatenation. So, we need to explicitly convert the numbers to a string.

Using Python str() Function

The Python str() function is used to convert the given value into a string. In this approach, we are going to apply the str() function to the integer to convert it to a string and then join the two strings using the '+' operator.

Syntax

Following is the syntax for the Python str() function -

str(x)

Example

Let's look at the following example, where we are going to use the str() function for concatenating a string with a number.

name = "Tutorialspoint_"
year = 2025
result = name + str(year)
print(result)

The output of the above program is as follows -

Tutorialspoint_2025

Using Python format() Method

The Python format() method is used to format the string by replacing the placeholders with the corresponding values.

Syntax

Following is the syntax for the Python format() method -

str.format(value1, value2...)

Example

Consider the following example, where we are going to use the format() method to concatenate the string with numbers.

num = 6
result = "You have {} notifications".format(num)
print(result)

The following is the output of the above program -

You have 6 notifications

Using Python f-strings

The third approach is by using the f-strings. In Python, f-strings are the efficient way to format strings. They are created by prefixing a string with the letter f or F. Inside the string, expressions or variables can be placed within the curly braces {}.

The python f-stings are introduced in the python 3.6, before that we had to use the format() method.

Example

In the following example, we are going to use the f-strimgs and observe the output.

x = "Welcome_To_"
y = 2025
print("The concatenated string is : ")
result = f'{x}{y}'
print(result)

The output of the above program is as follows -

The concatenated string is : 
Welcome_To_2025

Using % Operator

The fourth approach is by using %, we should write %s for each integer and string inside the quotes, as we want the final output as a string, then we will add the name of the number and string we are using with a %.

Example

Following is an example where we are going to use the "%" operator and concatenate the string with numbers.

a = "Chevrolet_Cheron_"
b = 2025
print("The concatenated string is : ")
result = '%s%s' % (a, b)
print(result)

The output of the above program is as follows -

Chevrolet_Cheron_2025