How to use range in python

Python3 range() function returns an iterable object (type is object), not a list type, so the list will not be printed when printing.

Python3 list() function is an object iterator, which can convert the iterable object returned by range() into a list, and the returned variable type is a list.

Python2 range() function returns a list.

Function syntax

range(stop)
range(start, stop[, step])

Parameter description:

start: Counting starts from start. The default is to start from 0. For example, range(5) is equivalent to range(0, 5);

stop: counts to the end of stop, but does not include stop. For example: range (0, 5) is [0, 1, 2, 3, 4] without 5

step: step size, default is 1. For example: range(0, 5) is equivalent to range(0, 5, 1)

Instance

>>>range(5)
range(0, 5)
>>> for i in range(5):
...     print(i)
... 
0
1
2
3
4
>>> list(range(5))
[0, 1, 2, 3, 4]
>>> list(range(0))
[]
>>>

has two parameters or three parameters (the second construction method) ::

>>>list(range(0, 30, 5))
[0, 5, 10, 15, 20, 25]
>>> list(range(0, 10, 2))
[0, 2, 4, 6, 8]
>>> list(range(0, -10, -1))
[0, -1, -2, -3, -4, -5, -6, -7, -8, -9]
>>> list(range(1, 0))
[]
>>>
>>>

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