---
id: 5e9a093a74c4063ca6f7c156
title: Numpy Boolean Arrays
challengeType: 11
isHidden: false
videoId: N1ttsMmcVMM
---

## Description

<section id='description'>
<em>Instead of using notebooks.ai like it shows in the video, you can use Google Colab instead.</em>

More resources:

- <a href="https://github.com/ine-rmotr-curriculum/freecodecamp-intro-to-numpy" target="_blank" rel="noopener noreferrer">Notebooks on GitHub</a>
- <a href="https://colab.research.google.com/github/googlecolab/colabtools/blob/master/notebooks/colab-github-demo.ipynb" target="_blank" rel="noopener noreferrer">How to open Notebooks from GitHub using Google Colab.</a>

</section>

## Tests

<section id='tests'>

````yml
question:
  text: |
    What will the following code print out?

    ```py
    a = np.arange(5)

    print(a <= 3)
    ```
  answers:
    - |
      ```python
      [False, False, False, False, True]
      ```
    - |
      ```python
      [5]
      ```
    - |
      ```python
      [0, 1, 2, 3]
      ```
    - |
      ```python
      [True, True, True, True, False]
      ```
  solution: 4
````

</section>