nix:tldr:a9cc5

nix: Start an interactive environment for evaluating Nix expressions.

$ nix repl

try on your machine

The command nix repl is used to start a Read-Eval-Print Loop (REPL) for the Nix programming language.

Nix is a purely functional package manager and a programming language designed for declaratively describing and managing software dependencies. The nix repl command allows you to interactively work with the Nix language and evaluate expressions in real-time.

When you run nix repl in your terminal, it will start a new session where you can enter Nix expressions and see the results of their evaluation. This can be useful for experimenting with Nix, debugging expressions, or understanding how certain functions or packages work.

Once the REPL is started, you can enter any valid Nix expression, and it will be evaluated and displayed in the console. You can define variables, functions, or import Nix modules directly in the REPL session.

For example, if you enter 2 + 2 in the Nix REPL, it will evaluate the expression and print 4 as the result. Similarly, you can evaluate more complex expressions like let x = 10; in x * x and it will output 100.

The nix repl command provides a convenient way to explore and experiment with the Nix programming language without having to build or install packages. It can be a valuable tool for learning, development, and troubleshooting within the Nix ecosystem.

This explanation was created by an AI. In most cases those are correct. But please always be careful and never run a command you are not sure if it is safe.

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