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.
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 Kernel and mode selection](https://resources.jetbrains.com.cn/help/img/datalore/2024.3/newnotebook_dialog.png)
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.
Go to
.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 Kernel menu](https://resources.jetbrains.com.cn/help/img/datalore/2024.3/kernel_menu.png)
Open the Computation tab from the left-hand toolbar.
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 Computation tab](https://resources.jetbrains.com.cn/help/img/datalore/2024.3/computation_tab.png)