advanced: echo

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site/pages/cmd/advanced/echo.html

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+---
+layout: page
+author: Alessandro Luini
+category-page: advanced
+category-title: Advanced commands
+tags: echo calculator print
+title: echo
+---
+
+
+
+
+    <h1>
+      <i> echo: </i> Printing strings command
+    </h1>
+
+<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>
+
+   <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>
+
+
+   <h3>Skills</h3>
+   <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>