Can I convert '123a' to int?

No, you cannot convert the string '123a' to an integer using the int() function in Python. The presence of the non-numeric character 'a' will cause a ValueError.

Here’s an example:

try:
    num = int('123a')  # This will raise a ValueError
except ValueError as e:
    print(f"Error: {e}")

In this case, the conversion will fail, and the error message will indicate that the string is not a valid integer.