Mysterious for loop in python

Question

Let exp = [1,2,3,4,5]

If I then execute x in exp, it will give me False. But if I execute :

for x in exp:
             


        

Answer 1

The syntax is similar, but they mean two different things.

x in exp is a conditional expression; it searches to see if the value of x appears in the list exp. If it's there, the expression evaluates to True, otherwise, False. You can also use not in.

for x in exp introduces a loop where x iterates over the elements of exp. The loop body will be called once for each element, and within the body, x will be set to each element successively.