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Python List Length: How To Get The Length Of A List In Python?

Python List Length: How To Get The Length Of A List In Python?

Get the length of a List in Python

To get the length of a list in Python, we can use the len() or length_hint() function. Follow the article to know the specific steps.

Python list length

In Python, ‘list’ is a data type that allows storing various data types inside it and retrieving their values through the position of the elements. In Python, you can say ‘list’ is the most flexible data type.

To get the length of a list, I have the following ways:

Ways To Get the length of a List in Python

Use the len() function

You can use the len() function to get the list’s length. Len() is a built-in function that counts the number of characters in the argument. The argument passed to the function can be a string or a list.

Syntax:

len(obj)

Parameters:

  • obj: object to get the length.

Example:

  • Create a list.
  • Use the len() function to get the length of a list.
myList = ['Tom', 'John', 'Jame', 'JackMa']

# Use the len() function to get the length of list
lenOfList = len(myList)

print('The length of list : ', lenOfList)

Output:

The length of list :  4

Use the length_hint() method

In Python the ‘operator’ module has a built-in length_hint() function. The length_hint() function returns the length for the ‘obj’ object.

Syntax:

length_hint(obj)

Parameters:

  • object: can be string, list, dict, tuple, etc.

Example:

  • Create a list.
  • Use the length_hint() function to get the length of a list.
  • Note: Declare the operator module before using the function.
from operator import length_hint
myList = ['Tom', 'John', 'Jame', 'JackMa']

# Use the length_hint() function to get the length of list
lenOfList = length_hint(myList)

print('The length of list : ', lenOfList)

Output:

The length of list :  4

Use For loop

The last way in this article I want to introduce to you is to use a for loop to get the length of a list.

Example:

  • Create a list.
  • Use the for loop to the length of a list.
myList = ['Tom', 'John', 'Jame', 'JackMa']

# Create a counter variable
lenOfList = 0

for i in myList:
    # The counter increments as it goes through each element of the list
    lenOfList = lenOfList + 1

print('The length of list : ', lenOfList)

Output:

The length of list :  4

Summary

Here are the methods that can help you get the length of a list in Python. If you have any questions about this article, please leave a comment below. I will answer your questions. Thank you for reading!

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