write a python program for Grading system .

 Marks = int(input("Enter marks :"))

if Marks >= 90 and Marks <=100:

    print("Grade : A")

elif Marks >= 80 and Marks <=89:

    print("Grade : B")

elif Marks >= 70 and Marks <=79:

    print("Grade : C")

elif Marks >= 60 and Marks <=69:

    print("Grade : D")

elif Marks >= 50 and Marks <=59:

    print("Grade : E")

elif Marks < 50:

    print("Grade : F")    

else:

    print("Enter Marks between 1 - 100")