Code

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

Explain. using loop

Answer 1

This here is a while loop. It will go round and round until its condition stops being True, then it ends.
This code introduces a list of words (four items) and the while loop iterates through it, assigning one item at a time to the word variable and printing word+'!'. Then it increments the counter.
The loop ends when the value of counter reaches the length of the list, as there are no more items to iterate on.