How to Find the Length of an Array in Python?

Posted on By Pythoneo

In Python, you can find the length of an array using various methods. The most commonly used method is the built-in len function, which returns the number of elements in an array.

Here’s an example of how to use len to find the length of an array:

my_array = [1, 2, 3, 4, 5]
length = len(my_array)
print(length) # Output: 5

Another way to find the length of an array is by using the shape attribute of an array from the NumPy library. Here’s an example of how to use NumPy to find the length of an array:

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import numpy as np

my_array = np.array([1, 2, 3, 4, 5])
length = my_array.shape[0]
print(length) # Output: 5

In this example, we first imported the NumPy library using the import statement. Then, we created an array using the np.array method and assigned it to the my_array variable. Finally, we used the shape attribute of the array to find the length of the array, which is the size of the first dimension of the array.

Both methods are valid ways to find the length of an array in Python. It’s up to you to choose the method that best fits your needs and the requirements of your program.

Python