I understand the 1st part of the quiz, but not the 2nd part of the quiz.

Question

I passed the quiz at this link.
https://teamtreehouse.com/library/python-basics-3/functions-and-looping/create-a-function
The first half I can understand. 
```PYTHON
def square(number):
    return number ** 2
square(5)

The second half I passed but do not understand what I did to pass
PYTHON
def square(number):
    return number ** 2
result = square(3)
print(result)
```
I read through several books on returns and functions nothing helped. I came across this guy https://www.youtube.com/watch?v=nuNXiEDnM44 and I kinda saw what he was saying so tried what I thought he meant it worked but I dont fully understand. 
can someone please explain what I did right here?

Jassim Alhatem · Accepted Answer

It's basically the same as the first one. But you just passed in a different number and you stored it in a variable.
Here's another example:
```python
def hello(word):
    return word + " Nate"
result1 = hello("Greetings")
result2 = hello("How are you")
result3 = hello("How are you doing")
print(result3)
```
You can reuse any of the results anytime you want, without having to pass in the same argument over and over again.
Adding a function to a variable makes your code cleaner, and follows the DRY principle.

m3shack · Answer

@Jassim Al-Hatem (https://teamtreehouse.com/jassimalhatem), Awesome! That helped me greatly.

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I understand the 1st part of the quiz, but not the 2nd part of the quiz.

2 Answers

Jassim Alhatem

Jassim Alhatem

m3shack

m3shack