Michael RussellPro Student 8,488 Points
Unable to concatenate List containing Strings with String.
I am working on the loop.py exercise, in which I have to create a For loop that will Print each String within the List called hellos and append the String "World" via concatenation.
I'm able to get the Strings in hellos to print without issue but run into trouble when I add + "World".
When I run the code, the String "Hello" will output and then I get the following error:
Traceback (most recent call last):
File "<stdin>", line 2, in <module>
TypeError: unsupported operand type(s) for +: 'NoneType' and 'str'
If I'm reading this correctly, I need to change the list from NoneType to String, but I'm not sure how.
hellos = [ "Hello", "Tungjatjeta", "Grüßgott", "Вiтаю", "dobrý den", "hyvää päivää", "你好", "早上好" ] for word in hellos: print(word) + "World"
andrenTreehouse Moderator 28,327 Points
The issue is actually that you are trying to append "World" to what the
word string due to the + being placed outside the parenthesis of the
If you place it inside the parenthesis then you won't get that error, but there is another issue. Which is the fact that when you concatenate a string the two strings are glued together without any spaces. So "Hello" + "World" for example would produce "HelloWorld", in order to get correct spacing you have to manually add a space.
Like this for example:
for word in hellos: print(word + " World")