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git-svn-id: svn+ssh://atelier.inf.usi.ch/home/bevilj/group-1@178 a672b425-5310-4d7a-af5c-997e18724b81
37 lines
815 B
HTML
37 lines
815 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: calculator sum add substract divide calculate compute
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title: bc
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---
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<p>
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In computing, <code>bc</code> is a command in Unix operating systems that can do easy
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calculations in the shell.<br>
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Usually input are passed using the <code>echo</code> command and pipes.
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The name stands for <i>Basic Calculator</i>.<br>
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<pre>
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echo "(12 / 2 - 3) * 3 + 1.5" | bc
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10.5
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</pre>
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<h3>Interactive mode</h3>
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Using the interactive mode makes you do calculations freely in a special shell inside the shell.
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All you need to do is run the bc command with the <code>-i</code> flag
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and no parameter.<br>
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To exit the interactive mode, write <i>quit</i>.
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<pre>
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bc -i
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1+1
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2
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(12 / 2 - 3) * 3 + 1.5
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10.2
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quit
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</pre>
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</p>
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