Code Snippet

score = input("Enter score: ")
score = int(score)
if score > 80 or score == 80:
    grade = 'A'
elif score > 70 or score == 70:
    grade = 'B'
elif score > 55 or score == 55:
    grade = 'C'
elif score > 50 or score == 50:
    grade = 'Pass'
else:
    grade = 'Fail'
print ("\n\nGrade is: " + grade)                    

Try it yourself