import math

# loop starts here
done = False
while(not done):
    grade = float(input("Enter the grade: "))
    grade_int = round(grade)
    print("You entered: "+str(grade)+", your rounded grade is: "+str(grade_int))

    if (grade_int >= 90):
        print('A')
    elif (80 <= grade_int < 90):
        print('B')
    elif (70 <= grade_int < 80):
        print('C')
    elif (60 <= grade_int < 70):
        print('D')
    else:
        print('F')
    response_str = input("Enter another? (y/n): ")
    if(response_str == 'n' or response_str == "no"):
        done = True
# loop ends here
print("Thank you for playing.")