I can not understand this case

Question

words = ["hello", "world", "spam", "eggs"]
counter = 0
max_index = len(words) - 1

while counter <= max_index:
word = words[counter]
print(word + "!")
counter = counter + 1

Answer 1

len() function returns the length of a list, in this case it returns 4 because it has Four strings separated by comma.
Subtracting 1 from len function is 4 - 1 = 3 which will be stored in the max_index variable

Now we will iterate through each object in the list until the condition is true. (0 <= 3)

Now we are accessing the value at the index specified by the counter variable (words[counter]) from the list and assigning it to the variable word, which we used in printing

On each iteration we are incrementing counter by 1 so that we don't get stuck in the loop forever.