NumPy: Check whether the numpy array is empty or not

Last update on March 24 2025 13:36:45 (UTC/GMT +8 hours)

Check if Array is Empty

Write a NumPy program to check whether the NumPy array is empty or not.

Pictorial Presentation:

Sample Solution:

Python Code:

# Importing the NumPy library and aliasing it as 'np'
import numpy as np

# Creating a NumPy array 'x' containing integers [2, 3]
x = np.array([2, 3])

# Creating an empty NumPy array 'y'
y = np.array([])

# Printing the size of array 'x'
# As 'x' contains 2 elements, its size is 2
print(x.size)

# Printing the size of array 'y'
# 'y' is an empty array, so its size is 0
print(y.size)

Sample Output:

2                                                                      
0

Explanation:

In the above code –

x = np.array([2, 3]): This line creates a NumPy array 'x' containing the integer values 2 and 3.

y = np.array([]): This line creates an empty NumPy array 'y'.

print(x.size): Print the size of array 'x' using the size attribute. In this case, the size is 2 since 'x' contains two elements.

print(y.size): Print the size of array 'y' using the size attribute. In this case, the size is 0 since 'y' is an empty array.

For more Practice: Solve these Related Problems:

• Write a NumPy program to determine if an array is empty by checking its size attribute.
• Create a function that returns a boolean indicating whether an array is empty, and test it on various shapes.
• Test the emptiness check on arrays produced by slicing operations that may result in empty outputs.
• Compare an empty array with a non-empty one by asserting that np.size returns 0 for the empty case.

Python-Numpy Code Editor: