python function help

[rob101]

From your example, result = 100 - 20 - 4 - 10

This could also be represented as result = 100 - (20 + 4 + 10)

In both cases the first value is treated one way, and all subsequent values are treated in a different way.

Here's a start:

def subtractElements(listNums):
    result = ???
    print("The result is", result

subtractElements([100, 20, 4, 10])

I hope I'm not contravening any kind of protocol with this post; please tell me if I am so that I don't make the same mistake again.

That aside, I've come up with this as a solution.

def subtractElements(listNums):
    result = listNums[0]
    for number in range(1, len(listNums)):
        result -= listNums[number] 
    print(result)

subtractElements([100, 20, 4, 10])

... but having done that, I read this: https://python-forum.io/thread-362.html

So, how to apply what is being said in that 'common pitfalls and what to do' to what I've done?

I ask simply because I want to improve my Python skills.

With thanks.

buran write Jun-14-2022, 05:37 AM:
Please, don't provide complete solution, even a poor one, to no effort questions. That's even more important in Homework section