2D Arrays

[Grzegorz Dostatni]

Try this:
>>> b=[]
>>> for x in range(0,5):
...     c=[]
...     for y in range(0,5):
...             c.append(y)
...     b.append(c)
... 
>>> b
[[0, 1, 2, 3, 4], [0, 1, 2, 3, 4], [0, 1, 2, 3, 4], [0, 1, 2, 3, 4], [0,
1, 2, 3, 4]]

Greg

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Mathematics is physics without purpose.

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-- Old Irish Saying 

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On Sat, 9 Sep 2000, Jad Courbage wrote:

> Hi,
> 
> Could anybody tell me the command to build a 2D array ? (without using the
> NumPy module)
> 
> I tried something like :
> 
> for i in range(0,5):
>      for j in range(0,10):
>           arr[i][j]=i*j
> 
> but it doesn't work !
> Do i have to declare the array ?
> 
> Thanks.
> 
> 
> jad.
> 
> 
>