Python

Grades are values between zero and 10 (both zero and 10 included), and are always rounded to the nearest half point. To translate grades to the American style, 8.5 to 10 become an A, 7.5 and 8 become a B, 6.5 and 7 become a C, 5.5 and 6 become a D, and other grades become an F. Implement this translation, whereby you ask the user for a grade, and then give the American translation. If the user enters a grade lower than zero or higher than 10, just give an error message. You do not need to handle the user entering grades that do not end in .0 or .5, though you may do that if you like in that case, if the user enters such an illegal grade, give an appropriate error message.