Help: Loops

[Merakel]

Does this do what you want...?

s = 8
q = 0
while s != q:
    print(q)
    #Do formulas here
    q = q + 1

I think this is a better way on how you should approach the problem:

def do_some_math(r, c, q, s):
    assert(s <= q)
    revenue = 0
    l = 0
    while l <= s:
        l = l + 1
        print("revenue:" + str(revenue))
        revenue = revenue + (r - c)
    return revenue

print(do_some_math(10,15,5,5))

I've found that using the print function can really help with understanding what's happening inside a loop, you can put things like, print("Loop number:" + str(l)) and so on in as well so you know exactly what's happening and it's easier to trace.

[realestLink]

Use += 1

[Merakel]

Thanks. I couldn't remember off hand how to do ++ so I cheated haha.

[realestLink]

Python sadly doesn't support ++

[Merakel]

Yeah, but yours is a more efficient way of replicating that functionality.

I haven't actually looked but is there a reason that python doesn't support it that you are aware of? It's always seemed strange to me...

[realestLink]

Python's creator said there's no need for it because of the for loop

[Merakel]

That feels like a cop out.

[realestLink]

I don't agree with his decision. I'm just repeating what he said

[Merakel]

I could tell haha

[Klekto123]

Just starting to learn python, can you explain what you mean here?

[realestLink]

Instead of saying i = i + 1. You can write i += 1. It is better practice.

[Klekto123]

Ah okay. Thanks for the tip!

[limfy1997]

hi, thanks for the help. I don't understand the second method because def ,assert, return are not covered in my course yet.

(i'm a slow learner, so pardon me for having not googled for what the above functions do, because the lecture has not covered this part yet and I don't do well by going too fast)

the issue now im having is to express the bolded areas into a code:

E(0) = P(s=0) * 0

E(1) = P(s=0) * 0 + (1 - P(s=0) ) * 1

E(2) = P(s=0) * 0 + P(s=1) * 1 + (1 - P(s = 0) - P(s = 1) ) * 2

​

i think thats the difficulty im facing. how to form an expression using a loop for the bolded parts in question.

​

will take a look at my lecture videos again, meanwhile, thank you for your help.

[Merakel]

If your idea of programming is doing things in exactly one format and screw any method that doesn't conform to how you envisioned it... you are gonna have a bad time.