Jan 23, 2016 · If you want variables to be global, you assign them specifically to the global object and this will work in either a script or REPL. global.a = 1; Global variables are generally frowned upon in node.js.

Declaring a JavaScript Variable. Creating a variable in JavaScript is called "declaring" a variable. You declare a JavaScript variable with the var or the let keyword:

Feb 24, 2025 · You can declare variables, create functions, and run any code that would work in a regular JavaScript runtime. In case of complex logic (like loops or functions), the REPL supports multi-line input. When you enter a block of code, the REPL will continue reading input until the block is complete. Example:

Oct 23, 2021 · To run REPL, simply run the following command in the shell or console. If the REPL command executes successfully, you will see > in the terminal. Here you can run the REPL commands. In the above example, we use a variable to store the value in it. If we use the keyword var to declare the variable, then it will store the values and print them later.

Variable Declarations. In REPL, we can declare variables dynamically using the var, let or const. It allows users to experiment with different variable scopes and behaviour without the need of separate script file. Variables declared in the REPL continue throughout the session, making it useful for calculations and debugging.

May 16, 2020 · You can build a REPL similar to the built-in Deno REPL and and evaluate expressions using the dangerous eval function. Through it you'll be able to access local variables and other things (e.g. window ).

Nov 7, 2023 · Through this article, you will learn how to declare and mutate variables using var, let, and const, and you'll get a better understanding of the differences between them. I will explain each concept in two parts: Before ES6 (var statement) After ES6 (let and const statements) Let's dive into these different ways of declaring variables in ...

You can declare variables, define functions, run loops, and do much more just as you would in a regular Node.js application.

Oct 3, 2024 · Here are some commonly used commands and features that will help you make the most of the REPL. 1. Checking Variables. You can declare and check variables just like you would in a JavaScript...

Oct 4, 2024 · Want to declare a variable? And REPL will tell you that 10 * 2 is, indeed, 20. Congratulations, you’re officially in the Matrix. But wait, there’s more! You can even import modules: REPL...