Writing a simple array program in python

Question

I have a simple problem and the statement goes like this:

Each new term in the Fibonacci sequence is generated by adding the previous two terms. By starting with 1 and 2, the first 10 terms will be: 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, ... I want to create the numbers as above:

The code that I am trying to write is as follows:

num(1)=1
num(2)=2
for i in range(3,10):
    num(i)=num(i-1)+num(i-2)
    print num(i)

The algorithm that I designed is as follows:

x(i)=x(i-1)+x(i-2)

I will start from x(3) with x(1) and x(2) unknown. Can anyone help me with in array syntax error ? Thanks.

karthikr · Accepted Answer · 2013-04-15 19:06:55Z

3

You can do:

num = range(1, 10)
num[0] = 1
num[1] = 2
for i in range(2,9):
    num[i]=num[i-1]+num[i-2]
    print num[i]

You need to use [] instead of ()

answered Apr 15, 2013 at 19:06

karthikr

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Vyktor · Accepted Answer · 2013-04-15 19:06:30Z

2

Python uses [] to address indexes in ~~array~~ list, so just use num[i] instead of num(i).

answered Apr 15, 2013 at 19:06

Vyktor

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boxed · Accepted Answer · 2013-04-15 19:07:51Z

0

The syntax for lists is to use square brackets ("[" and "]" like "num[3]"), not parenthesis. Then you have to remember that in programming indexes in lists start with 0, not 1. Then when you're done with that you have to create a list in the first place: num = [].

answered Apr 15, 2013 at 19:07

boxed

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