Table of Contents
In this example, you will learn to access the index of a list using a for loop.
To understand this example, you should have the knowledge of the following Python programming topics:
- Python for Loop
- Python List
- Python enumerate()
1. Example 1: Using enumerate
my_list = [21, 44, 35, 11] for index, val in enumerate(my_list): print(index, val)
Output
0 21 1 44 2 35 3 11
Using enumerate()
, we can print both the index and the values.
- Pass two loop variables
index
andval
in the for loop. You can give any name to these variables. - Print the required variables inside the for loop block.
The function of enumerate()
is to add a counter (i.e. index
) to the iterate and return it. If you want to learn more about enumerate()
, please visit Python enumerate().
2. Example 2: Start the indexing with non zero value
my_list = [21, 44, 35, 11] for index, val in enumerate(my_list, start=1): print(index, val)
Output
1 21 2 44 3 35 4 11
The value of the parameter start
provides the starting index.
3. Example 3: Without using enumerate()
my_list = [21, 44, 35, 11] for index in range(len(my_list)): value = my_list[index] print(index, value)
Output
0 21 1 44 2 35 3 11
You can access the index even without using enumerate()
.
- Using a for loop, iterate through the length of
my_list
. Loop variableindex
starts from 0 in this case. - In each iteration, get the value of the list at the current
index
using the statementvalue = my_list[index]
. - Print the
value
andindex
.
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