nums = [1, 2, 3, 4, 5]Element iteration
Loop all element
for value in nums: print(value)Loop from n-th element
for value in nums[n:]: print(value)Loop to n-th element
for value in nums[:n]: print(value)Access index0 as well.
for index, value in enumerate(nums): print(index) # 0, 1, 2, 3, 4Access index1 as well.
for index, value in enumerate(nums, start=1): print(index) # 1, 2, 3, 4, 5With Index
Python for loop, start from index 0.
for i in range(len(nums)): # 0,1,2,3,4 print(nums[i]) In Python 2
- range return list of numbers (all numbers pre-created).
- xrange return
xrangeobject (number is created on demand).
type(range(5)) # <type 'list'>type(xrange(5)) # <type 'xrange'>Python 3 range is similar to Python 2 xrange, but not exactly the same. There is no xrange for python 3.
To convert Python 3 range to list.
list(range(5))Python for loop, start from index 1.
for i in range(1, len(nums)+1): # 1,2,3,4,5 print(nums[i-1])Python for loop, reverse fron n-1 to 0.
for i in range(len(nums)-1, -1, -1): # 4, 3, 2, 1, 0 print(nums[i])