what is max_index

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

max_index = len(words) - 1
here what does max index means ? what is max index... how that works or this is a string

Answer 1

max_index is a variable. You take the length of the list, and minus one to account for the habit of programming languages to start counting from 0. The while statement then takes this number, and counts up to it, effectively printing all the items in the list.

tldr; It's nothing special, just an int. that is equel to the list length minus one.

Answer 2

"max_index" is a variable used as limit of iterations. The loop will be performed UNTIL variable "counter" matches with variable "max_index".