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

if marks >=70 and marks<=100:
	print("Grade A")
elif marks >=60 and marks<=70:
	print("Grade B")
elif marks >=50 and marks<=60:
	print("Grade c")
elif marks <40 and marks>=0:
	print("Fail")
else:
	print("Invalid")


109fd96751cf15fd6bd0b965dd39159110605bc7
<mask token>

<mask token>
if marks >= 70 and marks <= 100:
    print('Grade A')
elif marks >= 60 and marks <= 70:
    print('Grade B')
elif marks >= 50 and marks <= 60:
    print('Grade c')
elif marks < 40 and marks >= 0:
    print('Fail')
else:
    print('Invalid')

marks = float(input('Enter marks: '))
if marks >= 70 and marks <= 100:
    print('Grade A')
elif marks >= 60 and marks <= 70:
    print('Grade B')
elif marks >= 50 and marks <= 60:
    print('Grade c')
elif marks < 40 and marks >= 0:
    print('Fail')
else:
    print('Invalid')

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

if marks >=70 and marks<=100:
	print("Grade A")
elif marks >=60 and marks<=70:
	print("Grade B")
elif marks >=50 and marks<=60:
	print("Grade c")
elif marks <40 and marks>=0:
	print("Fail")
else:
	print("Invalid")

