_includes/example.rs.html


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<pre class='rust'>// This code is editable and runnable!
<span class='kw'>fn</span> main() {
<span class='comment'>// A simple integer calculator:
// `+` or `-` means add or subtract by 1
// `*` or `/` means multiply or divide by 2</span>

<span class='kw'>let</span> program = <span class='string'>"+ + * - /"</span>;
<span class='kw'>let</span> <span class='kw'>mut</span> accumulator = <span class='number'>0</span>;

<span class='kw'>for</span> token in program.chars() {
<span class='kw'>match</span> token {
    <span class='string'>'+'</span> => accumulator <span class='op'>+=</span> <span class='number'>1</span>,
    <span class='string'>'-'</span> => accumulator <span class='op'>-=</span> <span class='number'>1</span>,
    <span class='string'>'*'</span> => accumulator <span class='op'>*=</span> <span class='number'>2</span>,
    <span class='string'>'/'</span> => accumulator <span class='op'>/=</span> <span class='number'>2</span>,
    _ => { <span class='comment'>/* ignore everything else */</span> }
}
}

<span class='prelude-val'>println!</span>(<span class='string'>"The program \"{}\" calculates the value {}"</span>,
   program, accumulator);
}
</pre>