Jupyter Notebook start
Published: (December 25, 2025 at 11:30 AM EST)
1 min read
Source: Dev.to
Source: Dev.to
What is Jupyter Notebook?
Interactive coding environment for Python (and other languages like R, Julia via kernels).
Modes in Jupyter
- Command Mode – used to control cells,
Escto enter - Edit Mode – used to type code or text,
Enterto enter
Keyboard Shortcuts
| Shortcut | Action |
|---|---|
| Shift + Enter | Run cell & go to next |
| Ctrl + Enter | Run cell & stay |
| Alt + Enter | Run & insert new cell |
| A | Insert cell above |
| B | Insert cell below |
| Y | Convert to Code |
| D + D | Delete cell |
| C | Copy cell |
| X | Cut cell |
| V | Paste below |
| Shift + V | Paste above |
| Ctrl + / | Comment / Uncomment |
| Tab | Auto‑complete |
| Shift + Tab | Function help |
| Ctrl + Z | Undo |
| Ctrl + Y | Redo |
| M | Convert to Markdown |
File extension: Use .ipynb