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Fibonacci Sequence - not appending to list

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  #1  
Old February 7th, 2012, 10:01 PM
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breadbox breadbox is offline
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Fibonacci Sequence - not appending to list
Code:
fibonacci = [1, 2]

x = fibonacci[0]
y = fibonacci[1]
fourmillion = 4 ** 11 - 194304

while (fibonacci <= fourmillion):
    z = x + y
    fibonacci.append(z)
    x = y
    y = z


print fibonacci


Is there anything I should be using instead of lists here? The program runs without any errors, but only prints out [1, 2]...Is there something wrong with my syntax, which to me doesn't look to be the case, or what?

Is the while loop just not starting, or is it not appending to the list for some strange reason?

Haven't done much with while loops before, sorry if this is simple and stupid solution.

Thanks

EDIIIIIT: Maybe it is syntax error. But atm I don't know how to fix
Last edited by breadbox : February 7th, 2012 at 10:11 PM.
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  #2  
Old February 8th, 2012, 06:35 AM
totalknowledge totalknowledge is offline
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I don't think fibonacci <= fourmillion is a valid comparison. You are only looking for the nth value of fibonacci. You are currently never entering your loop.

You should just be able to use y instead. Since y is your nth value of fibonacci each loop, and you have it initialized at the beginning.

Code:
while (y <= fourmillion):
    z = x + y
    fibonacci.append(z)
    x = y
    y = z
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Old February 8th, 2012, 11:24 PM
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Quote:
Originally Posted by totalknowledge
I don't think fibonacci <= fourmillion is a valid comparison. You are only looking for the nth value of fibonacci. You are currently never entering your loop.

You should just be able to use y instead. Since y is your nth value of fibonacci each loop, and you have it initialized at the beginning.

Code:
while (y <= fourmillion):
    z = x + y
    fibonacci.append(z)
    x = y
    y = z


Gah, so stupid...

Thank you, friend <3
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