Simple question

[Phil Dobbin]

Hi, all.

I've just started to learn Python (I'm reading Mark Lutz's 'Learning
Python' from O'Reilly) & I'm confused as to this part:

'>>> 0.1 + 0.1 + 0.1 - 0.3
5.55111.....'

Using 'import Decimal' you can get a much closer result i.e.
'Decimal('0.0')'

What I'm wondering is why the first calculation that arrives at
'5.55111...' is so far out?

Many thanks,

Cheers,

  Phil...

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