#1 GRADE CALCULATOR
#Write a code that accepts user input for grade and will record them as A,B, C, D,E orF based on the following scale:
# A: 80-100 
# B: 70-79
# C: 60-69
# D: 50-59
# E: 40-49
# F: Below 40

#2 LOGIN SYSTEM
#Accept username and password
#USERNAME: THURSDAY
#PASSWORD: 90DAYS

#3 MULTIPLICATION TABLE

Grade = input("Enter your grade: ") 

if 80<=Grade<=100:
    print("A")
elif 70<=Grade<=79:
    print("B")
elif 60<=Grade<=69:
    print("C")
elif 50<=Grade<=59:
    print("D")
elif 40<=Grade<=49:
    print("E")
elif 40>Grade:
    print("F")  
else:
    print("error")