a question about for loop

Question

words = ["hello", "world", "spam", "eggs"]
for word in words:
print(word + "!")

a code like above, there is a result unexpectedlly. I mean I didn't even assign any value to "word", how come??

Answer 1

please indent the print statement

Answer 2

You can see a for loop as a sort of sequential assignment.

In effect it is the same as writing:

word = words[0]
print(word+'!')
word = words[1]
...

Answer 3

word in this case is already recognized as starting at 0 so when it is initiated / ran it recognizes every word in the array of words

https://code.sololearn.com/caSPVH0wnd4z/?ref=app

Answer 4

'word' is like an iterator which iterates over every element inside the list.
It is similar to enhanced for loop in Java.

Python-> for x in y:
Java-> for(int x : y)