iloc can only concatenate str (not "int") to str

The error message "TypeError: can only concatenate str (not 'int') to str" occurs when you try to concatenate a string with an integer using the "+" in Python.

To resolve this error, you need to convert the integer to a string before concatenating it. Here's an example:

x = 10
y = "The value of x is: " + str(x)
print(y)

This will output: "The value of x is: 10".

By using the `str()` function, we convert the integer `x` to a string before concatenating it with the other string.