#Write a program to prompt for a score between 0.0 and 1.0. If the score is out of range, print an error. If the score is between 0.0 and 1.0, print a grade using the following table:
#Score Grade
#>= 0.9 A
#>= 0.8 B
#>= 0.7 C
#>= 0.6 D
#< 0.6 F
#If the user enters a value out of range, print a suitable error message and exit. For the test, enter a score of 0.85.
# Desired output B


Score = input("Input score between 0.0 to 1.0: ")
try:
	score_float = float(Score)
except:
	print("You entered the wrong grade !!")
	quit()
if (score_float >= 0.0 and score_float <= 1.0) :
	if score_float >= 0.9 :
		print("A")
	elif score_float >= 0.8 :
		print("B")
	elif score_float >= 0.7 :
		print("C")
	elif score_float >= 0.6 :
		print("D")
	elif score_float < 0.6 :
		print("F")
else :
	print("Please enter a number between 0.0 to 1.0 only !!")