# How do I get a decimal value when using the division operator in Python?

## How do I get a decimal value when using the division operator in Python?

There are three options:

``````>>> 4 / float(100)
0.04
>>> 4 / 100.0
0.04
``````

which is the same behavior as the C, C++, Java etc, or

``````>>> from __future__ import division
>>> 4 / 100
0.04
``````

You can also activate this behavior by passing the argument `-Qnew` to the Python interpreter:

``````\$ python -Qnew
>>> 4 / 100
0.04
``````

The second option will be the default in Python 3.0. If you want to have the old integer division, you have to use the `//` operator.

Edit: added section about `-Qnew`, thanks to ΤΖΩΤΖΙΟΥ!

Other answers suggest how to get a floating-point value. While this wlil be close to what you want, it wont be exact:

``````>>> 0.4/100.
0.0040000000000000001
``````

If you actually want a decimal value, do this:

``````>>> import decimal
>>> decimal.Decimal(4) / decimal.Decimal(100)
Decimal(0.04)
``````

That will give you an object that properly knows that 4 / 100 in base 10 is 0.04. Floating-point numbers are actually in base 2, i.e. binary, not decimal.

#### How do I get a decimal value when using the division operator in Python?

Make one or both of the terms a floating point number, like so:

``````4.0/100.0
``````

Alternatively, turn on the feature that will be default in Python 3.0, true division, that does what you want. At the top of your module or script, do:

``````from __future__ import division
``````