How to Create a REPL in Go

You create a REPL in Go by reading user input from os.Stdin, executing logic, and printing results to os.Stdout in a loop.

package main

import (
	"bufio"
	"fmt"
	"os"
)

func main() {
	reader := bufio.NewReader(os.Stdin)
	for {
		fmt.Print("> ")
		input, _ := reader.ReadString('\n')
		fmt.Println("You typed:", input)
	}
}

A REPL is a loop that waits for you to type something, does something with it, and shows the result. It matters because it lets you test code or commands instantly without restarting the program. Think of it like a chatbot that runs your code immediately.