percentage and rank of student based on marks scored in various subjects

s04q02-solution.py

''' percentage and rank of student based on marks scored in various subjects '''

# function to input marks in english
def input_english_marks():
    english_marks = float(input("provide the marks scored english:" ))
    if english_marks > 80:
        print("Maximum marks in english is 80, please enter proper value")
        english_marks = float(input("provide the marks scored in english:" ))
        return english_marks
    else:
        return english_marks

# function to input marks in science
def input_science_marks():
    science_marks = float(input("provide the marks scored science:" ))
    if science_marks > 90:
        print("Maximum marks in science is 90, please enter proper value")
        science_marks = float(input("provide the marks scored in science:" ))
        return science_marks
    else:
        return science_marks

# function to input marks in mathematics
def input_mathematics_marks():
    mathematics_marks = float(input("provide the marks scored Mathematics:" ))
    if mathematics_marks > 100:
        print("Maximum marks in mathematics is 100, please enter proper value")
        mathematics_marks = float(input("provide the marks scored mathematics:" ))
        return mathematics_marks
    else:
        return mathematics_marks

# function to calculate percentage of student
def percentage_of_student():
    english = input_english_marks()
    science = input_science_marks()
    mathematics = input_mathematics_marks()
    percentage = ((english + science + mathematics)*100)/(80 + 90 + 100)
    return percentage

# function to provide rank to student
def rank_of_student():
    percent = percentage_of_student()
    if percent >= 90:
        print("You score first class marks")
    elif 90 > percent >= 75:
        print("You score second class marks")
    elif 75 > percent > 35:
        print("You score average marks")
    elif percent <= 35:
        print("You failed in exam")
        
# main function
def main():
    rank_of_student()
    
# main starts here
main()