Plz explain line number five (how counter is related to words )why in square brackets here , wht is the logic here ..?

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

https://www.sololearn.com/learn/JUMP_LINK__&&__Python__&&__JUMP_LINK/2431/