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

---
id: 5e9a093a74c4063ca6f7c156
title: Numpy Boolean Arrays
challengeType: 11
videoId: N1ttsMmcVMM
dashedName: numpy-boolean-arrays
---

# --description--

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

More resources:

-   [Notebooks on GitHub](https://github.com/ine-rmotr-curriculum/freecodecamp-intro-to-numpy)
-   [How to open Notebooks from GitHub using Google Colab.](https://colab.research.google.com/github/googlecolab/colabtools/blob/master/notebooks/colab-github-demo.ipynb)

# --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