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git-svn-id: svn+ssh://atelier.inf.usi.ch/home/bevilj/group-1@119 a672b425-5310-4d7a-af5c-997e18724b81
37 lines
1,003 B
HTML
37 lines
1,003 B
HTML
---
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layout: page
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author: Alessandro Luini
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category-page: advanced
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category-title: Advanced commands
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tags: echo calculator print
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title: echo
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---
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<h1>
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<i> echo: </i> Printing strings command
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</h1>
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<p> In computing, echo is a command in Unix operating systems that outputs the
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strings it is being passed as arguments. <br>
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It is a command typically used in
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shell scripts and batch files to output status text to the screen or a
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computer file, or as a source part of a pipeline.</p>
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<h3>How to use</h3>
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<p> To use this simple command just type "echo" with the topic we want to
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print. The computer will return your argument as a string, for example,
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<pre><code> echo hello world</pre></code>
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will return hello world.
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</p>
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<h3>Skills</h3>
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<ul>
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<li><h4>bc:</h4> It permits you to make arithmetic calculation
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through the terminal using this format:
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<pre><code> echo 12+4 | bc</code></pre>
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will return 16.</li>
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