This question already has answers here:
Add zeros to a float after the decimal point in Python
(5 answers)
Closed 5 years ago.
I need to print some results with 5 numbers after decimal points. I'm using round() function but it doesn't output the last digit if it's a zero. Example:
print(str(round(-82.43670009888078, 5)))
print(str(round(49.5211007473081, 5)))
Would output:
-82.4367
49.5211
But I need:
-82.43670
49.52110
If the last digit isn't 0 it works fine.
You can use .format() to print decimals
print ("{:.5f}".format(a))
This will print >>> 49.52110 as desired.
OR
you could simply use
format(a, '.5f')
Related
This question already has answers here:
Rounding a number in Python but keeping ending zeros
(6 answers)
Closed 7 months ago.
I tried the following in my Jupyter notebook. When I round off value to 3 decimal points, its showing 3 decimal values. But when I round off to 2 decimal points, its showing 1 decimal value only.
round(64.10343, 4)
output: 64.1034
round(64.10343, 3)
output: 64.103
round(64.10343, 2)
output: 64.1
It happens because when you round to two decimal points after rounding 64.10 is left since second decimal is zero, output is not displayed.
This question already has answers here:
Limiting floats to two decimal points
(35 answers)
how to format float number in python? [duplicate]
(3 answers)
variable number of digit in format string
(3 answers)
Closed 1 year ago.
I'm reading this textbook called "Practical Statistics for Data Scientists" and this :.3f keeps getting used in almost every f-string. What does :.3f mean? My guess is it has something to do with floating point numbers.
Example:
{house_lm_factor.intercept_:.3f}
This is show you how many number are printing:
>>> import math
>>> flt = math.pi
>>> f'{flt:.3f}'
'3.142'
>>> f'{flt:.5f}'
'3.14159'
>>> f'{flt:.10f}'
'3.1415926536'
This question already has answers here:
How can I format a decimal to always show 2 decimal places?
(13 answers)
Closed 5 years ago.
I have the following:
'{0:n}'.format(0/10.0)
which evaluates to
0
I want it to evaluate to
0.0
That is, there should always be 1 decimal place. What is the correct format for this?
Thanks.
print('{0:3.1f}'.format(0/10.0)) # '0.0'
f for fixed-point notation; 3 for the total number of places to be reserved for the whole string, 1 for the decimal places.
if your number is too big to fit into the 3 reserved spaces, the string will use more space:
print('{0:3.1f}'.format(10.0)) # '10.0'; 4 places
with a more recent python version you can use f-strings (i put the value in a variable for more legibility)
x= 0/10.0
print('f{x:3.1f}')
In [24]: "{0:.1f}".format(0)
Out[24]: '0.0'
If you change the data to float you the decimal .
a= 1.0 # "a" is a float
a= 1 # "a" is now a integer
try that :)
This question already has answers here:
Rounding a number in Python but keeping ending zeros
(6 answers)
Closed 6 years ago.
So let's say I have this code:
num = 1.29283
round(num, 2)
That rounds to 1.29, but if I do this:
num = 1.30293
round(num, 2)
That rounds to 1.3. I want to know if there is a way to have it round to 1.30; I know it is the same number, but I need it to print 1.30.
You can use string formatting for this. A number in python does not have such a thing as trailing zeros. So your question only make sense for strings.
Example:
>>> num = 1.30293
>>> "{:.2f}".format(num)
'1.30'
The .2f says that this is a float (f) and that you want two digits after the point .2. Read more about string formatting here
This question already has answers here:
How to display a float with two decimal places?
(13 answers)
Pad python floats
(4 answers)
Closed 8 years ago.
I'm sorry, I know this must be a duplicate, I can't find where else it's posted. Please feel free to link me to the original question and mark this as duplicate.
I would like to print a 3 digits of a number AFTER the decimal point in it.
For example:
number = 523.637382
I would like to print: 523.637
I have a feeling I can use something similar to this
print(str(number)[:7])
>>>523.637
However, this will not work if the number before the decimal is not 3 decimals.
Bonus points:
Would this be easy?
number = 500.220
#magic
>>>500.22
number = 500.2000003
#magic
>>>500.2
A (built-in) function that could do this is round:
>>> number = 523.637382
>>> rounded = round(number, 3) # 3 decimal places, for example
>>> rounded
523.637
This has already been answered for example here.
The good news, to answer the second part of your question, is that the round function automatically removes trailing zeroes. It's much harder to retain the zeros if you're defining a new variable: you need the decimal module; but it looks that that isn't necessary here.
>>> number = 523.60000001
>>> rounded = round(number, 3)
>>> rounded
523.6
print("%.3f" % number)
or, using the new-style formatting,
print("{0:.3f}".format(number))
If you're printing a str like above you can use string interpolation:
number = 33.33333
print("{0:.3f}".format(number))
#=> 33.333