# Grade_To_Letter_Converter.py
#
# Description: Write a Letter Grade converter
#              that converts a grade into a letter grade:
#                 A -> 90 to 100
#                 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
theGrade = int(input("Please, enter a grade between 0 and 100 (whole #): "))

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