演算子

https://www.sejuku.net/blog/68893

#from decimal import Decimal
from decimal import *

print(Decimal("123.45678").quantize(Decimal("0"), rounding=ROUND_HALF_UP))
print(Decimal("123.45678").quantize(Decimal("0.1"), rounding=ROUND_HALF_UP))
print(Decimal("123.45678").quantize(Decimal("0.01"), rounding=ROUND_HALF_UP))

print(Decimal("0.1").quantize(Decimal("0"), rounding=ROUND_HALF_UP))
print(Decimal("0.5").quantize(Decimal("0"), rounding=ROUND_HALF_UP))


f1 = Decimal("0.1")
f2 = Decimal("0.2")

print(f1 + f2)
f1 = Decimal(0.1)
f2 = Decimal(0.2)

print(f1 + f2)

f1 = 0.1
f2 = 0.2

print(f1 + f2)

price = 120
#tax=Decimal(0.00001)
#tax = price * 0.08
i = input('値を入力してください:')
#tax = float( price *= i )
#tax = (price *= i)

#i2 = float(i)
#x = 1000
#print(str(x)+"　です")
#print(print+tax)

#tax=Decimal(i)
#tax=float(i)
tax=int(i)
print(price,'  *  ',tax)
#print(tax)
print('anser:', price * tax)

#from decimal import Decimal

from decimal import *

print(Decimal("123.45678").quantize(Decimal("0"), rounding=ROUND_HALF_UP))

print(Decimal("123.45678").quantize(Decimal("0.1"), rounding=ROUND_HALF_UP))

print(Decimal("123.45678").quantize(Decimal("0.01"), rounding=ROUND_HALF_UP))

print(Decimal("0.1").quantize(Decimal("0"), rounding=ROUND_HALF_UP))

print(Decimal("0.5").quantize(Decimal("0"), rounding=ROUND_HALF_UP))

f1 = Decimal("0.1")

f2 = Decimal("0.2")

print(f1 + f2)

f1 = Decimal(0.1)

f2 = Decimal(0.2)

print(f1 + f2)

f1 = 0.1

f2 = 0.2

print(f1 + f2)

price = 120

#tax=Decimal(0.00001)

#tax = price * 0.08

i = input('値を入力してください:')

#tax = float( price *= i )

#tax = (price *= i)

#i2 = float(i)

#x = 1000

#print(str(x)+"　です")

#print(print+tax)

#tax=Decimal(i)

#tax=float(i)

tax=int(i)

print(price,'  *  ',tax)

#print(tax)

print('anser:', price * tax)