How to Count in Python Loop

This tutorial discusses about how to count in Python loop.

Count in a Loop in Python

In Python, we have many objects that can be treated as iterable. An iterable is an object like a list, tuple, or any other sequence of elements that can be iterated using a simple for loop.

Counting in a loop means making a note of every iteration to find the total number of iterations after the loop has stopped running.

How to Count in A Loop in Python

This tutorial will demonstrate ways how to count in a loop in Python.

Using a Counter Variable to Count in A Loop in Python

This method is very straightforward. We will declare a variable outside the loop and assign it a value of zero. In every iteration, we will increment its value and print it.

See the code below.

Output:

1
2
3

In the above example, we create a list lst that contains three elements. The variable c is initialized with zero. We use the for loop to iterate over this list. In every iteration, we increment the variable c and print its value.

Using the enumerate() Function to Count in A Loop in Python

The enumerate() function takes an iterable and assigns a counter variable to each element. This way, every element gets assigned a value that can act as the index of the element.

We can use this index variable to act as a counter variable for the loop.

See the code below.

Output:

0
1
2

In the above example, we display the index of the element after using the enumerate() function and iterating it. Note that the index starts from 0.

Using the zip() Function to Count in A Loop in Python

The zip() function can be used to combine two iterables into one by combining the individual elements at corresponding positions together.

We can create a list of the length iterable with the range() function. The two can be then combined to create a new iterable. This method is just another way to emulate the enumerate() function discussed previously.

The code is demonstrated below.

Output:

0
1
2

The range() function returns an object containing a sequence to the length of the list. This is combined with the list and the counter value is displayed.

Conclusion

To conclude, we discussed how to count in a loop in Python. In the first method, we initialize a variable and increment it in every iteration. The other methods involve the enumerate() and zip() functions to create an index for the iterable that can act as a counter variable.

That’s all about how to count in Python loop.

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