1 # round using int

     2 n = 17.3 # any float

     3 int (n + .5)

     4 

     5 # round it off to first decimal place

     6 round(amount * 10) / 10.0

     7 

     8 # round it off to nearest 5 paise

     9 round(amount * 20) / 20.0

    10 

    11 # exchange two variables

    12 a, b = b, a