# Manage kernels

Kernel is the element that runs the cells in your notebook. At the moment, Datalore provides kernels for Python, Kotlin, Scala, and R.

Procedure: Select kernel for a new notebook

You choose which kernel to choose in the new notebook on the Kernel tab of the New notebook dialog.

![Kernel and mode selection](https://resources.jetbrains.com.cn/help/img/datalore/2026.3/newnotebook_dialog.png)

Procedure: Manage kernel in the editor

You can interrupt or restart the kernel at any time working in the editor. There are two interfaces that you can use: Kernel menu and Computation tool.

Kernel menu:

1. Go to `Main menu | Kernel`.

2. Select one of the options from the menu:

* Interrupt kernel: used to stop the currently running task without stopping the kernel.

* Restart kernel: used to stop and start the kernel again. The main reason why you might need this is to clean the runtime environment of old variable data.

![Kernel menu](https://resources.jetbrains.com.cn/help/img/datalore/2026.3/kernel_menu.png)

Computation tool:

1. Open the ![Computation](https://resources.jetbrains.com.cn/help/img/datalore/2026.3/computation.svg)Computation tab from the left-hand toolbar.

2. Under Kernel, click one of the icons:

* Interrupt kernel: used to stop the currently running task without stopping the kernel.

* Restart kernel: used to stop and start the kernel again. The main reason why you might need this is to clean the runtime environment of old variable data.

![Computation tab](https://resources.jetbrains.com.cn/help/img/datalore/2026.3/computation_tab.png)