Погрешность при суммировании python 3.9

простой код:

    i = 0
while i < 5:
    i += 0.1
    print("i = ", i)

результат:

i =  0.1
i =  0.2
i =  0.30000000000000004
i =  0.4
i =  0.5
i =  0.6
i =  0.7
i =  0.7999999999999999
i =  0.8999999999999999
i =  0.9999999999999999
i =  1.0999999999999999
i =  1.2
i =  1.3
i =  1.4000000000000001

Откуда берется погрешность?