calculation

[pyzyx3qwerty]

Are you talking about like simple interest or something?

[astral_travel]

okay i got it,
i had a friend here helping me with the math..

so here's the final code:

end = float(input('please enter end price: '))
start = float(input('please enter start price: '))
years = float(input('please enter number of years: '))

avg_year = (end/start)**(1/years)

print(avg_year)

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yea pyzyx3qwerty i meant the interest, in any case - we got it solved

[buran]

i trade stocks for a living, i've been trading for the last 19 years, since age 17,

you kidding me, right? No offense, but you don't know how to calculate annual return over multi-year holding period, yet you trade for a living? I don't know how you make basic investment decisions or how you assess the decisions already made... :-) Or what if the holding period is less than a year...

You are not there yet... you need to subtract 1.
with your example, your code will produce

Output:
please enter end price: 21.97
please enter start price: 10
please enter number of years: 3
1.3

how do you think, what exactly is 1.3? Hint: your annual return is 30%.

[astral_travel]

well it doesn't matter much (1.3, 0.3 or 30%), as long as i understand what it means.

in anyway - i trade stocks, i don't invest (i hold positions for 2 days upto 2 weeks) so these kind of calculations aren't relevant to me so much (practically wise) - but it's interesting to see what kinda return different stocks made over the years, to see where i would land in relation to the investors...

trading isn't much about mathematics (as long as you are a discretionary trader) - of course that if you wanna write code to automate the process - then yes - there would be much math involved.