A course platform turns test scores (0 to 100) into letter grades: A for 90 and up, B for 80 to 89, C for 70 to 79, D for 60 to 69 and F below 60.
Write a function grade(score) that returns the letter as a string. If the score is below 0 or above 100, return "invalid" instead.
How it's checked
Your code runs, then the check below runs and its printed output is compared with ours.
grade(85) returns "B", and grade(101) returns "invalid"Hints, the later steps and the answer come with Pro.
def grade(score):
...