# expected results
# total height = 475
# number of students = 3
# average height = 158

student_heights = ["151", "145", "179"]
for n in range(0, len(student_heights)):
    student_heights[n] = int(student_heights[n])

##### 

total_height = 0
for h in student_heights:
    total_height += h
print(f"total height = {total_height}")

number_of_students = 0
for s in student_heights:
    number_of_students += 1
print(f"number of students = {number_of_students}")

average_height = total_height / number_of_students
print (f"average height = {average_height}")