freeCodeCamp/curriculum/challenges/english/08-data-analysis-with-python/data-analysis-with-python-course/numpy-boolean-arrays.md

---
id: 5e9a093a74c4063ca6f7c156
title: Numpy Boolean Arrays
challengeType: 11
videoId: N1ttsMmcVMM
bilibiliIds:
  aid: 208091324
  bvid: BV1Qh411p7V8
  cid: 409012711
dashedName: numpy-boolean-arrays
---

# --description--

*Instead of using notebooks.ai like it shows in the video, you can use Google Colab instead.*

More resources:

-  <a href="https://github.com/ine-rmotr-curriculum/freecodecamp-intro-to-numpy" target="_blank" rel="noopener noreferrer nofollow">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 nofollow">How to open Notebooks from GitHub using Google Colab.</a>

# --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]
```

## --video-solution--

4