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Solution for the "TypeError: unsupported operand type(s) for +: int and str" in Python - LearnShareIT

Solution for the “TypeError: unsupported operand type(s) for +: int and str” in Python

In this article, we talk about the “TypeError: unsupported operand type(s) for +: int and str” error in Python. This type of error occurs when we try to perform a mathematical operation between an integer and a string value. We must cast the variable to a number before using the additional operator. Keep reading for detailed information.

Why does this error occur?

In Python programming, the “TypeError: unsupported operand type(s) for +: int and str” error arises when we try to use the additional operator between a variable of type ‘int’ and a variable of type ‘string’.

To illustrate, here is an example of how this error occurs:

numValue = 1986
strValue = '1986'

result = numValue + strValue
print(f'The sum is: {result}')

Error:

TypeError: unsupported operand type(s) for +: 'int' and 'str'

As you can see, both the ‘numValue’ variable and the ‘strValue’ variable contain the value ‘1986’. However, these two variables ​​have two different types, ‘int’ and ‘string’.

Simply put, Python tells you that you cannot add an integer to a string using the addition operator via the above error message.

Solved – TypeError: unsupported operand type(s) for +: int and str

To work around this problem, you just need to convert the string to a number (float or integer).

You can use the int() function to cast the ‘string’ type to the ‘int’ type.

numValue = 1986
strValue = '1986'

# Cast the 'strValue' to an integer
result = numValue + int(strValue)
print(f'The sum is: {result}')

Output:

The sum is: 3972

Or you can also use the float() function to cast the ‘string’ type to the ‘int’ type.

numValue = 1986
strValue = '1986'

# Cast the 'strValue' to a float
result = numValue + float(strValue)
print(f'The sum is: {result}')

Output:

The sum is: 3972.0

Alternatively, you can convert all values ​​to string using str() function, then perform string concatenation.

numValue = 1986
strValue = '1986'

# Cast the 'numValue' to a string
result = str(numValue) + strValue
print(result)

Output:

19861986

Summary

In conclusion, the “TypeError: unsupported operand type(s) for +: int and str” error arises when we try to use the additional operator between a variable of type ‘int’ and a variable of type ‘string’. The solution to this problem is to convert the string to a number, as shown in the examples above. That’s the end of this post. We hope the information provided will be helpful to you.

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