In VS Code, you can efficiently run selected lines of code using two primary methods: the Shift+Enter keyboard shortcut or by right-clicking and choosing "Run Selection/Line in Python Terminal" (or a similar option) from the context menu. These methods are invaluable for testing specific parts of your script without executing the entire file, streamlining your development and debugging workflow.
Executing Code Selections: Two Primary Methods
VS Code provides powerful and intuitive ways to execute only the code you need directly within an integrated terminal. This capability is exceptionally useful for targeted testing, interactive debugging, or quickly experimenting with snippets of logic.
Method 1: Using the Keyboard Shortcut (Shift+Enter)
The Shift+Enter shortcut is the quickest and most commonly used method for running selected code or even individual lines.
- Select Your Code: Highlight one or more lines of code in your editor that you wish to execute.
- Press the Shortcut: With the lines selected, simply press
Shift+Enter. The selected code will be sent to the active integrated terminal and executed. - Smart Send (Cursor on a Line): For even greater efficiency, if your cursor is placed on a single line of code (without any text selected) and you press
Shift+Enter, VS Code's Smart Send feature will send just that specific line to the terminal for execution. This is incredibly convenient for quick, line-by-line testing and debugging.
This method is ideal for rapidly iterating on code, quickly checking variable states, or verifying the output of a small block during active development.
Method 2: Using the Right-Click Context Menu
Another intuitive way to run specific lines is through the editor's right-click context menu.
- Select Your Code: Highlight the one or more lines of code you want to run.
- Right-Click: Right-click anywhere within your selection.
- Choose "Run Selection/Line in Python Terminal" (or similar): From the context menu that appears, select the option typically named "Run Selection/Line in Python Terminal." The exact wording might vary slightly depending on the programming language extension installed and the type of interactive environment.
This option is clear and visually accessible, making it a good choice if you prefer mouse-based interaction or are exploring VS Code's features.
Why Run Selected Lines? Benefits for Developers
Executing selected lines of code offers significant advantages that can greatly enhance your coding productivity:
- Targeted Testing: Effortlessly test specific functions, methods, or code blocks in isolation without needing to run your entire program from start to finish.
- Interactive Debugging: Quickly check the value of variables, test small logical changes, or step through parts of your code without setting formal breakpoints or restarting a full debugging session.
- Rapid Prototyping: Experiment with new algorithms, data structures, or ideas by running small code snippets, allowing for quicker iteration and validation.
- Improved Workflow: Avoid frequent saving and full script executions, saving valuable time during the development cycle, especially for larger projects.
- Convenience: These methods are particularly convenient for testing just a part of a file, directly contributing to a smoother and more focused development experience.
Supported Languages and Extensions
While the example often highlights the Python Terminal, the capability to run selected lines is broadly supported across many programming languages through their respective VS Code extensions. For instance, developers can utilize similar methods for JavaScript, R, Julia, PowerShell, and more, typically through their integrated terminals or interactive environments. Always ensure you have the relevant language extension installed for the best experience.
- For comprehensive guidance on setting up and using Python in VS Code, refer to the official Python in VS Code documentation.
Quick Reference Table
| Method | Action | Primary Use Case |
|---|---|---|
Shift+Enter |
Select lines and press; or place cursor on line and press. | Quick iteration, Smart Send, rapid testing |
| Right-Click Context | Select lines, right-click, then "Run Selection/Line..." | Visual preference, explicit command execution |
