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Update control-flow.markdown - for statement section #1177

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Update control-flow.markdown - for statement section #1177

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10 changes: 10 additions & 0 deletions doc/site/control-flow.markdown
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Expand Up @@ -174,6 +174,16 @@ A `for` loop has three components:
3. A *body*. This is a curly block or a single statement. It gets executed once
for each iteration of the loop.

Note that a fresh variable is created for each iteration of the loop and so, if a [function](functions.html) in the body captures that variable, its value will not be affected by subsequent iterations.

<pre class="snippet">
var prints = []
for (i in 1..3) {
prints.add(Fn.new { System.print(i) })
}
for (print in prints) print.call() //> 1, 2, 3 not 3, 3, 3
</pre>

## Break statements

Sometimes, right in the middle of a loop body, you decide you want to bail out
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