for loops iterate over a collection of items, such as
dict, and run a block of code with each element from the collection.
for i in [0, 1, 2, 3, 4]: print(i)
for loop iterates over a list of numbers.
Each iteration sets the value of
i to the next element of the list. So first it will be
2, etc. The output will be as follow:
0 1 2 3 4
range is a function that returns a series of numbers under an iterable form, thus it can be used in
for i in range(5): print(i)
gives the exact same result as the first
for loop. Note that
5 is not printed as the range here is the first five numbers counting from
for loop can iterate on any iterable object which is an object which defines a
__getitem__ or a
__iter__ function returns an iterator, which is an object with a
next function that is used to access the next element of the iterable.