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<div><h1 id="a0000000089">1.13 do</h1>
<p><a name="a0000001011" id="a0000001011"></a> </p><pre>
do [loopname <loopname>]
"{"
...
"}" while <condition>
</pre><p>The <tt class="tt">do</tt> command<a name="a0000001012" id="a0000001012"></a> executes a block of commands repeatedly, checking the condition given in the <tt class="tt">while</tt> clause at the end of each iteration. If the condition is true then the loop executes again. This is similar to a <tt class="tt">while</tt> loop, except that the contents of a <tt class="tt">do</tt> loop are <em>a</em>lways executed at least once. The following example prints the numbers 1, 2 and 3: </p><pre>
i=1
do
{
print i
i = i + 1
} while (i < 4)
</pre><p>Note that there must always be a newline following the opening brace after the <tt class="tt">do</tt> command<a name="a0000001013" id="a0000001013"></a>, and the while clause must always be on the same line as the closing brace. </p></div>
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