Question

def computeGrade(percentage):
    '''
    - Return the corresponding letter grade string based on the value of
    percentage using the following scale:
    [100 - 90]: 'A'
    (90 - 80] : 'B'
    (80 - 70] : 'C'
    (70 - 60] : 'D'
    (60 - 0] : 'F'
    - If percentage is not a number type (int or float) OR if percentage is
    outside the range of [100 - 0], return an empty string ("").
    '''
    return "stub"

Answer 1

def computeGrade(percentage):
    """
    - Return the corresponding letter grade string based on the value of
    percentage using the following scale:
    [100 - 90]: 'A'
    (90 - 80] : 'B'
    (80 - 70] : 'C'
    (70 - 60] : 'D'
    (60 - 0] : 'F'
    - If percentage is not a number type (int or float) OR if percentage is
    outside the range of [100 - 0], return an empty string ("").
    """
    if type(percentage) not in [int, float] or (percentage < 0 or percentage > 100):
        return ""
    if 90 <= percentage <= 100:
        return "A"
    elif percentage >= 80:
        return "B"
    elif percentage >= 70:
        return "C"
    elif percentage >= 60:
        return "D"
    else:
        return "F"