How to Find the Length of a List in Python

In this tutorial, we will program 'How to Find the Length of a List in Python'. We will learn how to check the total length of a list. The objective is to enable you to efficiently determine the length of a list. I will provide a sample program to demonstrate the actual coding of this tutorial.

This topic is very easy to understand; just follow the instructions I provide, and you can also do it yourself with ease. The program I will show you covers the basics of programming for counting the total length in a list. I will do my best to provide you with the easiest way for getting the length So, let's start with the coding.

Getting Started:

First you will have to download & install the Python IDLE's, here's the link for the Integrated Development And Learning Environment for Python

Creating Main Function

This is the main function of the application. The following code will display a simple GUI in terminal console that will display program. To do this, simply copy and paste these blocks of code into the IDLE text editor.
  1. ret = False
  4. while True:
  5. print("\n================== Find the Length of a List ==================\n\n")
  6. my_list = [1, 4, 5, 7, 8, 9, 12, 15]
  9. print("The list is : " + str(my_list))
  12. counter = 0
  14. for i in my_list:
  15. counter = counter + 1
  17. print("\n")
  18. print("The length of list is : " + str(counter))
  20. opt = input("\nDo you want to try again?(yes/no): ")
  22. if opt.lower() == 'yes':
  23. ret=False
  24. elif opt.lower() == 'no':
  25. ret=True
  26. print("Exiting program....")
  28. else:
  29. print("Please enter yes/no:")
  30. break
  32. if ret == False:
  33. continue

This Python script calculates the length of a predefined list my_list. It prints the list and then uses a for loop to count the number of elements in the list, incrementing a counter variable for each element. After calculating the length, it prints the length of the list. The script then asks the user if they want to try again or exit the program.


The How to Find the Length of a List in Python source code that I provide can be download below. Please kindly click the download button.

There you have it we successfully created How to Find the Length of a List in Python. I hope that this simple tutorial help you to what you are looking for. For more updates and tutorials just kindly visit this site. Enjoy Coding!

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