#Jonathan Hudson
#Student Number 12347890
#Date: 2021-04-30
#Lecture Practice
# Convert from a letter grade to a number of grade points

# Read the letter grade from the user
letter = input("Enter a letter grade: ")

# Covert to a number of grade points
if letter == "A" or letter == "a":
  gp = 4.0
elif letter == "B" or letter == "b":
  gp = 3.0
elif letter == "C":
  gp = 2.0
elif letter == "D":
  gp = 1.0
elif letter == "F":
  gp = 0.0
else:
  gp = -1.0

# Display the result
if gp >= 0:
  print("A(n)", letter, "is equal to", gp, "grade points.")
else:
  print("That wasn't a valid letter grade.")