ex.3.3.py

"""
3.3 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.
"""
#python :

score = input("Enter score:")
try :
    score = float(score)
except :
    print("error, inter numeric input")
    exit()

if score <= 1 :
    if score >= 0.9 :
        print("A")
    elif score >=0.8 :
        print("B")
    elif score >= 0.7 :
        print("C")
    elif score >= 0.6 :
        print("D")
    elif score < 0.6 :
        print("f")
else :
    print("error , plaese inter correct score")