Student

 class Student:

    def __init__(self, name, roll, marks):

        self.name = name

        self.roll = roll

        self.marks = marks

    def display(self):

        print("Name:", self.name)

        print("Roll No:", self.roll)

        print("Marks:", self.marks)

        print("------------------")

students = []

while True:

    print("1. Add Student")

    print("2. Show Students")

    print("3. Exit")

    choice = input("Enter choice: ")

    if choice == "1":

        name = input("Enter name: ")

        roll = input("Enter roll number: ")

        marks = int(input("Enter marks: "))

        s = Student(name, roll, marks)

        students.append(s)

        print("Student added successfully!\n")

    elif choice == "2":

        for s in students:

            s.display()

    elif choice == "3":

        break

    else:

        print("Invalid choice\n")