Question

1. PYTHON: Write a program to continuously asks the user an score given as integer percentages in the range 0 to 100. Calculate the total number of grades in each letter-grade category as follows: 90 to 100 is an A, 80 to 89 is a B, 70 to 79 is a C, 60 to 69 is a D, and 0 to 59 is an F. Use a negative score as a sentinel value to indicate the end of the input. (The negative value is used only to end the loop, so do not use it in the calculations.) For example, if the input is.

Answer 1

categories = {}
while True:
    score = int(input("Enter a score given as integer percentages in the range 0 to 100: "))
    if score < 0:
        break
    if score >= 90:
        grade = 'A'
    elif score >= 80:
        grade = 'B'
    elif score >= 80:
        grade = 'C'
    elif score >= 80:
        grade = 'D'
    else:
        grade = 'F'
    if grade not in categories:
        categories[grade] = 0
    categories[grade] += 1

for grade in sorted(categories):
    print("Number of {} grades is {}".format(grade, categories[grade]))