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Running Code in Jupyter
Jupyter Notebook is an interactive environment for writing and running code.
Insert new cell below your selected cell by pressing the button
+in the menu on the top of your notebook.
Remove cells by pressing the button
✂in the menu on the top of your notebook. This button can also be used to cut your cell but it's more commonly used for removing a cell.
Save your notebook content by pressing the button
💾in the menu on the top of your notebook or
Son your hardware keyboard.
Code cells allow you to enter and run code. Run a code cell by pressing the
▶︎button in the menu on the top of your notebook, or
Enteron your hardware keyboard.
a = 10
There are a couple of keyboard shortcuts for running code:
Enterrun the current cell and enters command mode.
Enterruns the current cell and moves selection to the one below.
You can reset this state by restarting the kernel with "Restart and run all cells" button. It will clear the kernel that maintains the state of a notebook's computations => All your variables will be lost !
Code is run in a separate process called the kernel, which can be interrupted or restarted. You can see kernel indicator in the top-right corner reporting current kernel state:
⚪︎means kernel is ready to execute code
⚫︎means kernel is currently busy.
Tapping kernel indicator will open kernel menu, where you can reconnect, interrupt or restart kernel.
Try running the following cell — kernel indicator will switch from
⚫︎, i.e. reporting kernel as "busy". This means that you won't be able to run any new cells until current execution finishes, or until kernel is interrupted.
If kernel dies you will be prompted to restart it.
You can interrupt manually a cell execution by pressing the
⬜button while the execution is running. It will stop the execution and display an error message : "KeyboardInterrupt"
Try running the following cell and stop the execution by pressing the
Restart your kernel by pressing the button
↻in the menu on the top of your notebook