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<h1>Range expressions</h1>
<p>The expression <code>E1 to E2</code> returns a sequence of integers. For example, <code>1 to 5</code>
returns the sequence <code>1, 2, 3, 4, 5</code>. This is useful in <code>for</code> expressions, for example
the first five nodes of a node sequence can be processed by writing <code>for $i in 1 to 5 return (//x)[$i]</code>.</p>
<p>If you prefer, you can write this as <code>(//x)[position() = 1 to 5]</code>. This works because
comparison of a single integer (<code>position()</code>) to a sequence of integers (<code>1 to 5</code>)
is true if the integer on the left is equal to any integer in the sequence.</p>
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