README.md

Class Exercise 1: Let’s write code!

Create a Python class called GradeCalculator that calculates the grade of a student based on their marks. The class should have the following method:

• calculate_grade(marks: int) -> str: This method should take an integer as input and return a string representing the grade of the student. The grade should be calculated as follows:
  • 90-100: A
  • 80-89: B
  • 70-79: C
  • 60-69: D
  • 0-59: F

Open lesson 1/exercise 1/main.py and extend it with your solution. You can execute the code or look into the lesson 1/exercise 1solution.py file to see the correct answer.

In case your marks are not in the range of 0-100, the method should return Invalid marks.

Example usage

grade_calculator = GradeCalculator()
print(grade_calculator.calculate_grade(95)) # Output: A
print(grade_calculator.calculate_grade(-100)) # Output: Invalid marks