# Write your Python code here

#adding while loop in our grade calculator
# let i=the number of students
i=0
while i<5:
  marks = int(input("Enter your marks : "))


  if(marks<40):
    print("your grade id 'C'")
  elif(marks<60):
    print("your grade is 'B'")
  elif(marks<80):
    print("your grade is 'A'")
  else:
    print("your grade is 'A+'")
  i+=1

print("done for all students")


#i have done this for 5 students only..if i have to change the number of students whose i have to check their grade , just change the value of i