20, 14, 8, 2, -4 , values does counter variable I assume when this loop executes.
With Python's sequence data types—strings, lists, and tuples—the for loop processes each item in turn.
The loop's body is then executed after each item is (re-)assigned to the loop variable.
Generally speaking, a for loop looks like this: for LOOP VARIABLE in SEQUENCE:
You don't need to construct the loop variable before the for statement executes because it is generated when it does. The loop variable is assigned to the subsequent element in the sequence during each iteration, after which the body's statements are carried out. When the last element in the sequence is reached, the statement is complete.
Due to the fact that this particular flow loops back up to the top after each iteration.
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