""" Purpose: demonstrate use of round() function to get a number with desired
        number of significant digits after the decimal point.
"""

# get input and convert to decimal
reply = input( "Enter number: " )
number = float( reply )

print()

# compute eight versions of number
number6 = round( number, 6 )            # rounds to six places after the decimal
number5 = round( number, 5 )            # rounds to five places after the decimal
number4 = round( number, 4 )            # rounds to four places after the decimal
number3 = round( number, 3 )            # rounds to three places after the decimal
number2 = round( number, 2 )            # rounds to two places after the decimal
number1 = round( number, 1 )            # rounds to one place after the decimal
number0 = round( number, 0 )            # rounds to zero places after the decimal
                                        # (produces a decimal)

rounded = round( number    )            # rounds to an integer

# display original number and its eight variants
print( "number:", number )

print()

print( "round( number, 6 ):", number6 )
print( "round( number, 5 ):", number5 )
print( "round( number, 4 ):", number4 )
print( "round( number, 3 ):", number3 )
print( "round( number, 2 ):", number2 )
print( "round( number, 1 ):", number1 )
print( "round( number, 0 ):", number0 )

print()

print( "round( number ):", rounded )