Question 10:
Write a Python program to accept marks of a student and print the grade according to the given criteria:

Answer:
- Marks ≥ 90: A
- Marks ≥ 80: B
- Marks ≥ 70: C
- Marks ≥ 60: D
- Otherwise: Fail
"""

def main(marks: int) -> None:
    if marks >= 90:
        grade = 'A'
    elif marks >= 80:
        grade = 'B'
    elif marks >= 70:
        grade = 'C'
    elif marks >= 60:
        grade = 'D'
    else:
        grade = 'Fail'
    
    print(f"Grade: {grade}")

if __name__ == '__main__':
    main(95)
    main(85)
    main(75)
    main(65)
    main(55)

Output:
Grade: A
Grade: B
Grade: C
Grade: D
Grade: Fail