#write a program that reads numeric grade for the course and outputs 
#letter grade using the following table:

#A grade>=90
#B grade>=80 and grade <=89
#C grade>=70 and grade <=79
#D grade>=60 and grade <=69
#F grade <60

#Discussion
#Input: one integer, between 0 and 100, stored in variable grade
#Output: corresponding letter grade
#Calculations: if-elif-else statement
#Input limitations: grade must be between 0 and 100 inclusive.
#First version of solution will NOT include validity check

#Input
grade=int(input("enter grade "))

#Calculations and Output
if(grade>=90):
	print("grade is A")
elif(grade>=80):
	print("grade is B")
elif(grade>=70):
	print("grade is C")
elif(grade>=60):
	print("grade is D")
else:
	print("grade is F")