# Grade_To_Letter_Converter_Improved.py
#
# Description: Write a Letter Grade converter that
#              converts a grade into letter grade:
#                 A -> 90 to 100 (inclusively)
#                 B -> 80 to 89
#                 C -> 70 to 79
#                 D -> 60 to 69
#                 E -> 50 to 59
#                 F -> 0  to 49
#
# Author: Anne Lavergne
# Date: M Jan. 22 2024

# Ask the user for a grade and read the grade
prompt = "Please, enter a grade (integer between 0 and 100)? "
theGrade = int(input(prompt).strip())

# User input validation
if theGrade < 0 or theGrade > 100:
    print("The grade you entered is either < 0 or > 100!")
    print("Please, try again!")
else:
    # Convert grade to letter grade
    # If grade is between 90 and 100 (inclusively), the letter A
    if theGrade >= 90:
        print("A")
        
    # If grade is between 80 and  89 (inclusively), the letter B
    elif theGrade >= 80:
        print("B")
        
    # If grade is between 70 and  79 (inclusively), the letter is C
    elif theGrade >= 70:
        print("C")
        
    # If grade is between 60 and  69 (inclusively), the letter is D
    elif theGrade >= 60:
        print("D")
        
    # If grade is between 50 and  59 (inclusively), the letter is E
    elif theGrade >= 50:
        print("D")
        
    # If grade is between 0 and  49 (inclusively), the letter is F
    else:
        print("F")

print("Bye!")