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

Question

For example, the standard division symbol \'/\' rounds to zero:

>>> 4 / 100
0

However, I want it to return 0.04. What do I use?

Answer 1

A simple route 4 / 100.0

or

4.0 / 100

Answer 2

Import division from future library like this:

from__future__ import division

Answer 3

You could also try adding a ".0" at the end of the number.

4.0/100.0

Answer 4

It's only dropping the fractional part after decimal. Have you tried : 4.0 / 100

Answer 5

Add the following function in your code with its callback.

# Starting of the function
def divide(number_one, number_two, decimal_place = 4):
    quotient = number_one/number_two
    remainder = number_one % number_two
    if remainder != 0:
        quotient_str = str(quotient)
        for loop in range(0, decimal_place):
            if loop == 0:
                quotient_str += "."
            surplus_quotient = (remainder * 10) / number_two
            quotient_str += str(surplus_quotient)
            remainder = (remainder * 10) % number_two
            if remainder == 0:
                break
        return float(quotient_str)
    else:
        return quotient
#Ending of the function

# Calling back the above function
# Structure : divide(<divident>, <divisor>, <decimal place(optional)>)
divide(1, 7, 10) # Output : 0.1428571428
# OR
divide(1, 7) # Output : 0.1428

This function works on the basis of "Euclid Division Algorithm". This function is very useful if you don't want to import any external header files in your project.

Syntex : divide([divident], [divisor], [decimal place(optional))

Code : divide(1, 7, 10) OR divide(1, 7)

Comment below for any queries.

Answer 6

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