Python - Loop Lists

You can traverse the items in a list with Python's for loop construct. The traversal can be done, using list as an iterator or with the help of index.

Syntax

Python list gives an iterator object. To iterate a list, use the for statement as follows −

for obj in list:
   . . .
   . . .

Example 1

Take a look at the following example −

lst = [25, 12, 10, -21, 10, 100]
for num in lst:
   print (num, end = ' ')

Output

It will produce the following output −

25 12 10 -21 10 100

Example 2

To iterate through the items in a list, obtain the range object of integers "0" to "len-1". See the following example −

lst = [25, 12, 10, -21, 10, 100]
indices = range(len(lst))
for i in indices:
   print ("lst[{}]: ".format(i), lst[i])

Output

It will produce the following output −

lst[0]: 25
lst[1]: 12
lst[2]: 10
lst[3]: -21
lst[4]: 10
lst[5]: 100

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