Add introduction to arrow syntax in for...in expression documentation (#48942)

Copilot · BillWagner · web-flow · commit d0b5f562d449 · 2025-10-08T15:08:05.000-04:00
* Initial plan

* Add introduction to arrow syntax in for...in expression documentation

Co-authored-by: BillWagner &lt;493969+BillWagner@users.noreply.github.com&gt;

---------

Co-authored-by: copilot-swe-agent[bot] &lt;198982749+Copilot@users.noreply.github.com&gt;
Co-authored-by: BillWagner &lt;493969+BillWagner@users.noreply.github.com&gt;
diff --git a/docs/fsharp/language-reference/loops-for-in-expression.md b/docs/fsharp/language-reference/loops-for-in-expression.md
@@ -46,7 +46,7 @@ The output is as follows.
 788
 ```
 
-The following example shows how to loop over a sequence, and how to use a tuple pattern instead of a simple variable.
+The following example shows how to loop over a sequence, and how to use a tuple pattern instead of a simple variable. In this example, the sequence expression uses the `->` operator, which is a shorthand for `do yield` in sequence expressions and other computation expressions. The `->` operator allows you to specify an expression whose value becomes part of the sequence. For more information, see [Sequences](sequences.md) and [Computation Expressions](computation-expressions.md).
 
 [!code-fsharp[Main](~/samples/snippets/fsharp/lang-ref-2/snippet5202.fs)]
 

Original file line number	Diff line number	Diff line change
`@@ -46,7 +46,7 @@ The output is as follows.`
`46`	`46`	`788`
`47`	`47`	```
`48`	`48`
`49`		`-The following example shows how to loop over a sequence, and how to use a tuple pattern instead of a simple variable.`
	`49`	+The following example shows how to loop over a sequence, and how to use a tuple pattern instead of a simple variable. In this example, the sequence expression uses the `->` operator, which is a shorthand for `do yield` in sequence expressions and other computation expressions. The `->` operator allows you to specify an expression whose value becomes part of the sequence. For more information, see [Sequences](sequences.md) and [Computation Expressions](computation-expressions.md).
`50`	`50`
`51`	`51`	`[!code-fsharp[Main](~/samples/snippets/fsharp/lang-ref-2/snippet5202.fs)]`
`52`	`52`