The built-in function python3 range ()

First, the syntax is:

Range (STOP) 
Range (start, STOP, STEP) 
start: start counting from the beginning, starting from 0 is the default. eg: range (5) equivalent to a Range (0,5) 
stop: stop counting to the end, but not stop. eg: range (0,5) of [0,1,2,3,4], no. 5 
STEP: step size, default is one. eg: range (0,5) is equivalent to the range (0,5,1) 

Note:

Returns: an iterator objects (object type), not a list, it does not print when printed list 
list () function Object iterator, can range iterables returned () into a list, returned list variable type 

II example: 
example 1:

. 1 A = Range (. 5 )
 2  
. 3  Print ( " Example. 1: " )
 . 4  Print (A)
 . 5  Print ( " Range (. 5) of the return type is:% S " % type (A))
 . 6  
. 7  for I in Range (. 5 ):
 . 8      Print (I)
 . 9  
10  # example. 1: 
. 11  # Range (0,. 5) 
12 is  # Range (. 5) of the return type is: <class 'Range'> 
13 is  # 0 
14  # . 1 
15  # 2
16 # 3
17 # 4

Example 2:

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