Why they used 'counter' while defining ' word' ?

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

here why we need to use counter in 5th line. I mean why word = words [counter] why not word=workds only?

Answer 1

words is an array of strings. "words[counter]" refers to the item in that array. It return Only one item, whereas calling words alone will return a dull array. Do you see the difference?

Answer 2

To be more specific: an array is a set of objexts which are numbered from 0 to n-1. let's say your array name is Arr. to "call" or " look at" the first item, you write Arr[0]. for the second: Arr[1] and so on. this ia why using a counter that goes from 0 to n-1 is so helpful and this is why you have to write it that way, to compare one string on the left side to the one on the other side.

Answer 3

what does "{}" mean in Python?

Answer 4

may be I've got it 😅 Paul

Answer 5

Tanzim Ikram Sheikh - hope this helps!

counter is used as index of list words:

counter = 0 - > words[0] = 'hello'
...
counter = 3 - > words[3] = 'eggs'

After each iteration, counter needs to advance by 1 in order to print the next item in words:

counter +=1

This is done, until the max index (3) is reached. Note that words has 4 items, so len(words) = 4, but list indices always start at 0. Hence:

max_index = len(words) - 1

Answer 6

I've finished basic lessons here but I am still not capable of writing codes myself. So if I go through all lessons will I be able to write codes on my own ? Jan Markus

Answer 7

Tanzim Ikram Sheikh - yes, you will be able to write simple programs in Python. I recommend you use a laptop or (pydroid if you're on a phone). The SL ide is quite limited.

Answer 8

thanks a lot 😊Jan Markus

Answer 9

okay. btw thanks 😊Johannes