How to Fix - TypeError: can only concatenate str (not 'int') to str

In Python, it is common to encounter the error message “TypeError: can only concatenate str (not “int”) to str”. This error occurs when you try to concatenate a string and an integer value without explicitly converting the integer to a string. In this tutorial, we will discuss why this error occurs and how to fix it.

Understanding the error

The error message “TypeError: can only concatenate str (not “int”) to str” occurs when you try to concatenate a string and an integer value without explicitly converting the integer to a string. For example, consider the following code:

age = 25
print("I am " + age + " years old.")

This code will result in the following error message:

TypeError: can only concatenate str (not "int") to str

This error occurs because Python does not know how to concatenate a string and an integer value. In order to concatenate a string and an integer value, you need to convert the integer to a string using the str() function.

How to fix the error

To fix the “TypeError: can only concatenate str (not “int”) to str” error, you need to explicitly convert the integer value to a string using the str() function and then perform the string concatenation. Here are the steps to fix the error:

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Identify the line of code that is causing the error.
Convert the integer value to a string using the str() function.
Concatenate the string and the converted integer value using the + operator.

Here is an example of how to fix the error:

age = 25
print("I am " + str(age) + " years old.")

In this example, we have converted the integer value age to a string using the str() function. We have then concatenated the string “I am ” with the converted integer value using the + operator.

Conclusion

In conclusion, the “TypeError: can only concatenate str (not “int”) to str” error occurs when you try to concatenate a string and an integer value without explicitly converting the integer to a string. To fix this error, you need to convert the integer value to a string using the str() function and then concatenate the string and the converted integer value using the + operator.

Author

Piyush Raj

Piyush is a data professional passionate about using data to understand things better and make informed decisions. He has experience working as a Data Scientist in the consulting domain and holds an engineering degree from IIT Roorkee. His hobbies include watching cricket, reading, and working on side projects.

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