x=1 y=1.0 z='1' print(type(x),type(y),type(z)) print(0.5-0.4) print(0.5-0.2) print(0.1+0.1+0.1) u=0.1 print(type(u)) from decimal import Decimal #(decimal-library, Decimal-class) x=Decimal('0.1') print(x) print(type(x))