# Introduction This tutorial explains the usage of the `concatenate()` function in NumPy library. The `concatenate()` function is mainly used to combine two or more NumPy arrays together. In other words, it is used to join a sequence of arrays along an existing axis. By using this function, we can concatenate arrays together either horizontally or vertically. ## VM Tips After the VM startup is done, click the top left corner to switch to the **Notebook** tab to access Jupyter Notebook for practice. Sometimes, you may need to wait a few seconds for Jupyter Notebook to finish loading. The validation of operations cannot be automated because of limitations in Jupyter Notebook. If you face issues during learning, feel free to ask Labby. Provide feedback after the session, and we will promptly resolve the problem for you.
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