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REPL, once an inherent property of the interpreted languages, has now found its way into compiled languages too. Tools like CSharpRepl for C# and Jshell for Java make it happen.
A REPL is an interactive programming environment that takes single user inputs, executes them, and returns the result to the user; input (Read), execute the input (Evaluate), return the result to the user (Print), wait for the next input (Loop).
So what's the deal with REPL? It's all about the immediate feedback loop you get; you can enter program elements one at a time, immediately see the result, and make adjustments as needed. You can evaluate anything;variables, code blocks, functions, even define full-fledged classes and use them in the REPL console, always getting instant feedback, or even use C#/Java as a scripting language for testing purposes and running short lived utility scripts.
https://www.i-programmer.info/news/89-net/15883-csharprepl-brings-repl-superpowers-to-c.html
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