🔒 Issue with my interest calculator - Beginnner | Python | Page 1

violet wadi Jul 17, 2024, 12:25 AM

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Either my code is wrong or my math is wrong lol. Can't figure out for the past hour... PLEASE do not give out the answers directly, I would appreciate it. Indirect helps only, I'd like to improve myself.

Code:

loan = 1000

for years in range(10):
    answer = (5/100) * loan * years
    print(f"Year {years + 1} is ${answer + loan}")```

vagrant pastureBOT Jul 17, 2024, 12:25 AM

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violet wadi Either my code is wrong or my math is wrong lol. Can't figure out for the past h...

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@violet wadi

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trail notch Jul 17, 2024, 12:25 AM

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what does it do, and how does that differ from what you want it to do?

violet wadi Jul 17, 2024, 12:26 AM

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Well on internet I got this project called loan calculator. It's suppose to be the following response:

trail notch Jul 17, 2024, 12:26 AM

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||pretty sure it's your math that's wrong, not your code||

violet wadi Jul 17, 2024, 12:26 AM

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I end up getting this

violet wadi Jul 17, 2024, 12:27 AM

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trail notch ||pretty sure it's your math that's wrong, not your code||

Oof

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Tried looking for formular across internet as well. I don't get it it's still not giving the result

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No?

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Percentage/100 * loan

trail notch Jul 17, 2024, 12:28 AM

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so imagine Robert gets a 5% raise every single year, the bastard

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that's basically what you should be doing

violet wadi Jul 17, 2024, 12:29 AM

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answer * 2?

trail notch Jul 17, 2024, 12:29 AM

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no idea what you're asking

violet wadi Jul 17, 2024, 12:29 AM

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My brain is not braining lol

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It's suppose to be doubling every year

trail notch Jul 17, 2024, 12:29 AM

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what is?

violet wadi Jul 17, 2024, 12:29 AM

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5% more

violet wadi Jul 17, 2024, 12:29 AM

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trail notch what is?

The interest

trail notch Jul 17, 2024, 12:30 AM

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what kind of interest doubles every year?!

violet wadi Jul 17, 2024, 12:30 AM

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Lol loan

raw niche Jul 17, 2024, 12:30 AM

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Your for loop isn't using the previous years result when calculating the next one, you're approximating by adding 5% for each year, but that's not the same.

open pelican Jul 17, 2024, 12:30 AM

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violet wadi Well on internet I got this project called loan calculator. It's suppose to be t...

^it's not doubling every year here

trail notch Jul 17, 2024, 12:30 AM

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never heard of a loan like that.

violet wadi Jul 17, 2024, 12:31 AM

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By double I meant every years it gets +5%

trail notch Jul 17, 2024, 12:31 AM

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typically, interest is a constant percentage, like 5%/year

open pelican Jul 17, 2024, 12:31 AM

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violet wadi By double I meant every years it gets +5%

+5% of what? This is not a rhetorical question

trail notch Jul 17, 2024, 12:31 AM

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violet wadi By double I meant every years it gets +5%

ah well ok. That's like saying "by 'rabbit', I mean 'backhoe'"

violet wadi Jul 17, 2024, 12:32 AM

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violet wadi No?

How about we start by this. What is suppose to be the formula for the interest here. Is the one shown here wrong?

raw niche Jul 17, 2024, 12:33 AM

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You're doing:
1000+0.05×1000=1050
1050+0.05×1000=1100
You want:
1000+0.05×1000=1050
1050+0.05×1050=1102.5

violet wadi Jul 17, 2024, 12:34 AM

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And 1050 is suppose to increase every year

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Let me give it a try

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Ah

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SSo here's my problem

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I have the formula I just don't know how to loop it

soft musk Jul 17, 2024, 12:42 AM

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what formula

violet wadi Jul 17, 2024, 12:42 AM

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1000+0.05×1000=1050

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loan + 0.05 * loan = answer

soft musk Jul 17, 2024, 12:43 AM

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what loop

violet wadi Jul 17, 2024, 12:43 AM

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I'm suppose to loop it where every year it increases the interest of 5%

soft musk Jul 17, 2024, 12:44 AM

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no loop needed

open pelican Jul 17, 2024, 12:44 AM

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So have you made any changes to your code? Does it work?

violet wadi Jul 17, 2024, 12:44 AM

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Changes yea several, working nope still figuring

violet wadi Jul 17, 2024, 12:45 AM

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soft musk no loop needed

Ah

open pelican Jul 17, 2024, 12:45 AM

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I think it's more useful to do it with loops if the goal is to learn programming

violet wadi Jul 17, 2024, 12:46 AM

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Right

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I mean I'm aware the power up could double it every time

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But I'd like to make the progress in coding

open pelican Jul 17, 2024, 12:47 AM

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Show your current code if you want a hint

violet wadi Jul 17, 2024, 12:48 AM

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loan = 1000

for years in range(10):
    answer = loan + 0.05 * loan
    total = answer + 0.05 * answer
    print(f"Year {years + 1} is ${total}")```

soft musk Jul 17, 2024, 12:48 AM

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the scope of answer and total prevents it from being changed

violet wadi Jul 17, 2024, 12:49 AM

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Yea I noticed cuz every year it shows the same amount

soft musk Jul 17, 2024, 12:49 AM

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so one of them needs to come out of the loop

violet wadi Jul 17, 2024, 12:50 AM

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Hm

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Throw out the answer

soft musk Jul 17, 2024, 12:59 AM

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violet wadi Throw out the answer

?

violet wadi Jul 17, 2024, 12:59 AM

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I was able to change the concept

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Here's the recent code

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loan = 1000
percentage  = 0.05
for i in range(10):
  loan+=(loan*percentage)
  print("Year {i+1} is {loan}")

open pelican Jul 17, 2024, 1:04 AM

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What's the output of this code?

soft musk Jul 17, 2024, 1:05 AM

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loan+=(loan*percentage)
this calculation is unorthodox

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and your string isnt formatted

violet wadi Jul 17, 2024, 1:05 AM

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open pelican Jul 17, 2024, 1:06 AM

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violet wadi Well on internet I got this project called loan calculator. It's suppose to be t...

^looks the same as here

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So seems correct

violet wadi Jul 17, 2024, 1:06 AM

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Yea

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Yea

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It's weird the formula is loan * percentage and then +1 to the loan

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Different formula from what's out there lol

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Anyways thanks

soft musk Jul 17, 2024, 1:07 AM

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you could change the range of i to be range(1, 11)

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and for loan * percentage you would need to make the percentage 1.05

violet wadi Jul 17, 2024, 1:08 AM

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Y could hut wanted to get use to +=

soft musk Jul 17, 2024, 1:08 AM

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sure

violet wadi Jul 17, 2024, 1:08 AM

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Typos my bad I switched to phone

soft musk Jul 17, 2024, 1:09 AM

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you could use *= though

violet wadi Jul 17, 2024, 1:09 AM

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violet wadi Y could hut wanted to get use to +=

I could but I wanted to get used to using +=

soft musk Jul 17, 2024, 1:09 AM

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loan *= percentage

violet wadi Jul 17, 2024, 1:09 AM

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Various ways to do I guess

mighty hemlock Jul 17, 2024, 2:02 AM

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violet wadi ```py loan = 1000 percentage = 0.05 for i in range(10): loan+=(loan*percentag...

loan = 1000
print("Loan Calculator\n$1000 over 10 years at 5% APR")
for n in range(10):
    loan *= 1.05
    print(f'Year {n+1} is {round(loan,2)}')

soft musk Jul 17, 2024, 2:09 AM

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you dont round money

mighty hemlock Jul 17, 2024, 2:11 AM

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violet wadi Well on internet I got this project called loan calculator. It's suppose to be t...

This is rounding money

soft musk Jul 17, 2024, 2:14 AM

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some weird rounding

vagrant pastureBOT Jul 17, 2024, 3:14 AM

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#🔒 Issue with my interest calculator - Beginnner