---
layout: page
author: Alessandro Luini
category-page: advanced
category-title: Advanced commands
tags: echo calculator print
title: echo
---






<p> In computing, echo is a command in Unix operating systems that outputs the
  strings it is being passed as arguments. <br>
  It is a command typically used in
  shell scripts and batch files to output status text to the screen or a
  computer file, or as a source part of a pipeline.</p>
<br>
   <h3>How to use</h3>

     <p> To use this simple command just type "echo" with the topic we want to
        print. The computer will return your argument as a string, for example,
        <pre><code> echo  hello world</pre></code>
        will return hello world.
     </p>

<br>

   <h3>Skills</h3>
   <br>
   <ul>
     <li><h4>bc:</h4> It permits you to make arithmetic calculation
       through the terminal using this format:
       <pre><code> echo 12+4 | bc</code></pre>
       will return 16.</li>