Display floating point number in decimal form in Python?

Question

Let's say I have the following float point number in Python

>>>a = 10 ** -10
>>>print a
1e-10

How can I display .0000000001 instead of 1e-10?

felipsmartins · Accepted Answer · 2016-01-23 22:46:22Z

5

>>> a = "%0.10f" % (10 ** -10)
>>> a
'0.0000000001'

answered Jan 23, 2016 at 22:39

felipsmartins

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4 Comments

I think your 9 is meant to be a 10 otherwise they only get 9 0's

@Twitchykid Yes! But him got a point. That is just a exemple. ;)

Is there a way to remove trailing zeros? For example if I do "%0.10f" % (10 ** -2) it will print 0.0100000000.

@Mike I don't think so. 0.0100000000 is not the same than 0.0100000000.

Philipp Braun · Accepted Answer · 2016-01-23 22:42:11Z

2

Maybe a bit more readable:

a = float("1e-10")
format(a, ".10f")

Output

'0.0000000001'

answered Jan 23, 2016 at 22:42

Philipp Braun

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Dušan Maďar · Accepted Answer · 2016-01-23 22:43:55Z

1

Or using format

>>> a = 10 ** -10
>>> '{a:0.10f}'.format(a=a)

answered Jan 23, 2016 at 22:43

Dušan Maďar

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