#Write a program that reads a number of students in the class
#grade for each student, and finds average grade 

#Discussion:
#Input: number of students, stored in variable num_stud, integer
#grade for each student, stored in variable grade
#Calculations: 
#1. find sum of all grades - using LOOP WHILE 
#2. ave=sum/num_stud
#Input limitations (assume input is valid): num_stud>0, 
#grade>=0 and grade<=100 

def main():
	num_stud=int(input("enter number of students "))
	sum=0
	counter=1
	while(counter<=num_stud):
		grade=int(input("enter grade "))
		sum=sum+grade	
		counter=counter+1
	ave = sum/num_stud
	print("average grade is", ave)
main()