What is a Counter Variable in for Loops?

Question

This is the code in the lesson:

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

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

Here I am trying to understand it:
while 0 is less than or equal to 3:
word equals the list labeled words[0]
print(word plus "!")
counter = 1

I am not understanding what the counter does

Answer 1

Okay thank you, I think I get it

Answer 2

Counter is variable you used to count only certain numbers iterations to be done only...
In this example, counter incremented every time one so for value 0 to 3(max_index), loop runs when it is 4,loop stop iterating..
It just user defined variable taken as a counter, so you can use any other variable like i, j, k...

Answer 3

Wel come..