ZIO learning - hello world with for comprehension / published by https://github.com/dacr/code-examples-manager #153cb6ed-f751-454b-b2d4-96c6ce45ed63/d137a861bb5f4f9c471617fbe929e1445a8b87c

zio-learning-1-hello-3.sc

// summary : ZIO learning - hello world with for comprehension
// keywords : scala, zio, learning, pure-functional, helloworld
// publish : gist
// authors : David Crosson
// license : Apache License Version 2.0 (https://www.apache.org/licenses/LICENSE-2.0.txt)
// id : 153cb6ed-f751-454b-b2d4-96c6ce45ed63
// created-on : 2021-03-27T17:52:36+01:00
// managed-by : https://github.com/dacr/code-examples-manager
// run-with : scala-cli $file

// ---------------------
//> using scala "3.4.2"
//> using dep "dev.zio::zio:2.0.13"
//> using dep "fr.janalyse::zio-worksheet:2.0.13.0"
// ---------------------

// ------------------------------------------------------------------------------
// Inspired from Example coming from https://zio.dev/docs/getting_started.html

import zio.*, zio.worksheet.*

// --  The program value, which describes the program we want to execute
val logic = for {
  _    <- Console.printLine("Hello! What is your name?")
  name <- Console.readLine
  _    <- Console.printLine(s"Hello, $name, welcome to ZIO!")
} yield ()

// logic contains a functional effect, i.e. a data structure modelling procedural effects
// "Immutable data structures that model procedural effects are called functional effects"

// -- Let's execute our program
logic.unsafeRun