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12,195 questions

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573 users

How to use decimal for rounding values in Python

7 Answers

0 votes
import decimal
 
context = decimal.getcontext()

context.rounding = decimal.ROUND_HALF_UP

print(round(decimal.Decimal('3.1'), 0))
print(round(decimal.Decimal('3.4'), 0))
print(round(decimal.Decimal('3.5'), 0))
print(round(decimal.Decimal('3.6'), 0))
print(round(decimal.Decimal('3.9'), 0))



'''
run:

3
3
4
4
4 

'''

 




answered Jun 9, 2019 by avibootz
edited Jun 9, 2019 by avibootz
0 votes
import decimal
 
context = decimal.getcontext()

context.rounding = decimal.ROUND_HALF_DOWN

print(round(decimal.Decimal('3.1'), 0))
print(round(decimal.Decimal('3.4'), 0))
print(round(decimal.Decimal('3.5'), 0))
print(round(decimal.Decimal('3.6'), 0))
print(round(decimal.Decimal('3.9'), 0))



'''
run:

3
3
3
4
4

'''

 




answered Jun 9, 2019 by avibootz
edited Jun 9, 2019 by avibootz
0 votes
import decimal
 
context = decimal.getcontext()

context.rounding = decimal.ROUND_HALF_EVEN

print(round(decimal.Decimal('3.1'), 0))
print(round(decimal.Decimal('3.4'), 0))
print(round(decimal.Decimal('3.5'), 0))
print(round(decimal.Decimal('3.6'), 0))
print(round(decimal.Decimal('3.9'), 0))



'''
run:

3
3
4
4
4

'''

 




answered Jun 9, 2019 by avibootz
0 votes
import decimal
 
context = decimal.getcontext()

context.rounding = decimal.ROUND_CEILING

print(round(decimal.Decimal('3.1'), 0))
print(round(decimal.Decimal('3.4'), 0))
print(round(decimal.Decimal('3.5'), 0))
print(round(decimal.Decimal('3.6'), 0))
print(round(decimal.Decimal('3.9'), 0))



'''
run:

4
4
4
4
4

'''

 




answered Jun 9, 2019 by avibootz
0 votes
import decimal
 
context = decimal.getcontext()

context.rounding = decimal.ROUND_DOWN

print(round(decimal.Decimal('3.1'), 0))
print(round(decimal.Decimal('3.4'), 0))
print(round(decimal.Decimal('3.5'), 0))
print(round(decimal.Decimal('3.6'), 0))
print(round(decimal.Decimal('3.9'), 0))



'''
run:

3
3
3
3
3

'''

 




answered Jun 9, 2019 by avibootz
0 votes
import decimal
 
context = decimal.getcontext()

context.rounding = decimal.ROUND_FLOOR

print(round(decimal.Decimal('3.1'), 0))
print(round(decimal.Decimal('3.4'), 0))
print(round(decimal.Decimal('3.5'), 0))
print(round(decimal.Decimal('3.6'), 0))
print(round(decimal.Decimal('3.9'), 0))



'''
run:

3
3
3
3
3

'''

 




answered Jun 9, 2019 by avibootz
0 votes
import decimal
 
context = decimal.getcontext()

context.rounding = decimal.ROUND_UP

print(round(decimal.Decimal('3.1'), 0))
print(round(decimal.Decimal('3.4'), 0))
print(round(decimal.Decimal('3.5'), 0))
print(round(decimal.Decimal('3.6'), 0))
print(round(decimal.Decimal('3.9'), 0))



'''
run:

4
4
4
4
4

'''

 




answered Jun 9, 2019 by avibootz
...