FAQ: Code Challenge: Loops - Greetings


This community-built FAQ covers the “Greetings” exercise from the lesson “Code Challenge: Loops”.

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This exercise can be found in the following Codecademy content:

Computer Science

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I genuinely don’t know why this is wrong. May I get some help? I don’t want them to just give me the answer; I want my logic to be adjusted.

def add_greetings(names):
  for i in names:
    names.append('Hello, ' + i)

EDIT: So I figured out that I’m causing an infinite loop. but now my code looks like this:

def add_greetings(names):
  greeting = ["Hello, " + i for i in names]

print(add_greetings(["Owen", "Max", "Sophie"]))

But my output is “None”


Why doesn’t this work? I mean technically it does, but without providing a return statement I have to deal with “None” showing up at the right

When I try to write the code with “return” instead of “print” I get only “Hello, Owen”. Why doesn’t it loop through all of the names?

This is literally just me trying to figure out alternate paths to the same solution–I’ve already completed the assignment the way it asked. Thank you for your help!


I can’t fix your logic because I’m at the same level as you, but I was told in a previous post I made that “none” shows up because the program CodeAcademy uses expects some kind of return statement within the functions you create.

This was for a different project, but I also had “None” show up in this project and adding return worked. Maybe try “return names.append(greeting)”


I had the same error, figured out that the indentation in return function was the cause.