Using the Node.js REPL
The Node.js REPL is a powerful tool that lets you run JavaScript code interactively, directly from your terminal. REPL stands for Read-Eval-Print Loop, and it provides an environment where you can quickly test snippets of code, experiment with JavaScript features, or debug simple logic without creating files. When you launch the REPL by typing node in your command line (without specifying a file), you enter a prompt where you can type and execute JavaScript statements one at a time.
The REPL is especially useful for:
- Trying out JavaScript expressions and statements;
- Testing functions or logic before adding them to a larger program;
- Exploring Node.js global objects and APIs;
- Debugging small pieces of code in isolation.
Basic commands in the REPL include entering expressions, using variables, and calling functions. You can exit the REPL at any time by pressing Ctrl+C twice or typing .exit. Additional REPL commands start with a dot, such as .help to display available commands.
index.js
REPL stands for Read-Eval-Print Loop. This describes the interactive cycle where Node.js reads your input, evaluates the code, prints the result, and waits for more input.
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The Node.js REPL is a powerful tool that lets you run JavaScript code interactively, directly from your terminal. REPL stands for Read-Eval-Print Loop, and it provides an environment where you can quickly test snippets of code, experiment with JavaScript features, or debug simple logic without creating files. When you launch the REPL by typing node in your command line (without specifying a file), you enter a prompt where you can type and execute JavaScript statements one at a time.
The REPL is especially useful for:
- Trying out JavaScript expressions and statements;
- Testing functions or logic before adding them to a larger program;
- Exploring Node.js global objects and APIs;
- Debugging small pieces of code in isolation.
Basic commands in the REPL include entering expressions, using variables, and calling functions. You can exit the REPL at any time by pressing Ctrl+C twice or typing .exit. Additional REPL commands start with a dot, such as .help to display available commands.
index.js
REPL stands for Read-Eval-Print Loop. This describes the interactive cycle where Node.js reads your input, evaluates the code, prints the result, and waits for more input.
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