How to round a number to its lowest value using int() in python

Question

What I want is:

if 1700 / 1000 = 1.7 = int(1) # I want this to be True
   lst.append("T")

My original code was:

if 1700 / 1000 == int(1) # This is False and I want it to be True
   lst.append("T")

The if statement is False because the answer is 1.7 and not 1. I would like this to be True. So I want the 1.7 to round down to 1 using int so that the if statement will be True.

Welcome to StackOverflow. Some documentation that will help: https://docs.python.org/3.7/library/operator.html#mapping-operators-to-functions . Note that "division" has three flavors. You are looking for the last (which does a floordiv). — rajah9, Jan 08 '21 at 12:09

mhhabib · Answer 1 · 2023-01-29T09:10:18.347

5

// always provide integer value. If you want to get always integer then use it otherwise follow int(a/b)

if 1700 // 1000 == int(1):  # I want this to be True
    lst.append("T")

edited Jan 29 '23 at 09:10

answered Jan 08 '21 at 11:56

mhhabib

2,975
1
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1

This works because / does a floating point division and // does an integer division. – rajah9 Jan 08 '21 at 11:57

score 3 · Answer 2 · answered Jan 08 '21 at 11:53

You either need to put the int on the other side:

if int(1700 / 1000) == 1
   lst.append("T")

i.e. round the 1700/1000 to an integer before comparing it, or use //, which is integer division and discards the fraction part:

if 1700 // 1000 == 1
   lst.append("T")

score 3 · Answer 3 · answered Jan 08 '21 at 11:54

3

You can either use the // operator (integer division) or use the floor function from the math module:

>>> from math import floor
>>> floor(1.7/1)
1
>>> floor(1.7/1) == int(1)
True
>>> 1.7 // 1
1.0
>>> 1.7 // 1 == 1
True

answered Jan 08 '21 at 11:54

MatsLindh

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Aaron Alphonso · Answer 4 · 2021-01-13T06:33:54.000

3

You can try

if int(1700/1000) == 1 # I want this to be True
   lst.append("T")

int(1700/1000) will convert the 1.7 into 1 by ignoring the decimal portion of the number

edited Jan 13 '21 at 06:33

answered Jan 08 '21 at 11:54

Aaron Alphonso

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score 1 · Answer 5 · answered Jan 08 '21 at 11:53

1

Everything brilliant is simple

if int(1700 / 1000) == int(1): 
   lst.append("T")

answered Jan 08 '21 at 11:53

Paitor

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score 1 · Answer 6 · answered Jan 08 '21 at 11:54

You should take a look at the floor and ceil functions. The floor function rounds to the last number, whereas ceil to the next. In your case, you need to do it like this:

import math

if math.floor(1700 / 1000) == int(1):
   print("TRUE")
else:
    print("FALSE")

score 0 · Answer 7 · answered Jan 08 '21 at 11:56

0

You could round up or down in Python by 'floor' and 'ceil' methods in the 'math' library.

from math import floor, ceil
print (floor(1.7), ' , ', ceil(1.7))

The result will be

1 , 2

This will work in either Python 2.x or Python 3.x

answered Jan 08 '21 at 11:56

Amir Maleki

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How to round a number to its lowest value using int() in python

7 Answers7