Question

How to use decimal for rounding values in Python

Answer 1

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 

'''

 

70+ SQL courses for beginners and professionals

Answer 2

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

'''

 

70+ SQL courses for beginners and professionals

Answer 3

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

'''

 

70+ SQL courses for beginners and professionals

Answer 4

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

'''

 

70+ SQL courses for beginners and professionals

Answer 5

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

'''

 

70+ SQL courses for beginners and professionals

Answer 6

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

'''

 

70+ SQL courses for beginners and professionals

Answer 7

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

'''

 

70+ SQL courses for beginners and professionals