python range

1for i in range([start], stop[, step])

1# range(start, stop, step)
2  # start = index to begin at (INCLUSIVE)
3  # stop = generate numbers up to, but not including this number (EXCLUSIVE)
4  # step = (can be omitted) difference between each number in the sequence
5
6arr = [19,5,3,22,13]
7
8# range(stop)
9for i in range(len(arr)):
10    print(arr[i]) # prints: 19, 5, 3, 22, 13
11
12# range(start, stop)
13for i in range(2, len(arr)):
14    print(arr[i]) # prints: 3, 22, 13
15    
16# range(start, stop, step)
17for i in range(0, len(arr), 2):
18    print(arr[i]) # prints: 19, 3, 13
19    
20# reverse:
21for i in range(len(arr)-1, -1, -1):
22    print(arr[i])
23

1range(4)        # [0, 1, 2, 3] 0 through 4, excluding 4
2range(1, 4)     # [1, 2, 3] 1 through 4, excluding 4
3range(1, 10, 2) # [1, 3, 5, 7, 9] 1 through 10, counting by 2s
4

1# range(start, stop, step)
2  # start = (can be ommitted) index to begin at (INCLUSIVE)
3  # stop = generate numbers up to, but not including this number (EXCLUSIVE)
4  # step = (can be omitted) difference between each number in the sequence
5
6# idx:  0	1	2	3 	4
7# arr:  19	5	3	22	13
8  
9arr = [19,5,3,22,13]
10
11# range(stop)
12for i in range(len(arr)):
13    print(arr[i]) # prints: 19, 5, 3, 22, 13
14
15# range(start, stop)
16for i in range(2, len(arr)):
17    print(arr[i]) # prints: 3, 22, 13
18    
19# range(start, stop, step)
20for i in range(0, len(arr), 2):
21    print(arr[i]) # prints: 19, 3, 13
22    
23# reverse:
24for i in range(len(arr)-1, -1, -1):
25    print(arr[i])

1range(start, stop, step)
2 
3x = range(0,6)
4for n in x:
5print(n)
6>0
7>1
8>2
9>3
10>4
11>5

1for i in range(0, 4):
2	print(i)
3
4>0
5>1
6>2
7>3
8
9
10
11for i in range(4):
12	print(i)
13  
14>0
15>1
16>2
17>3
18
19
20
21for i in range(0, 4, 2):
22	print(i)
23    
24>0
25>2