doc: explain labelled break and continue (#6890)

doc/docs.md

@@ -947,6 +947,30 @@ stuck in an infinite loop.
 
 Here `i` doesn't need to be declared with `mut` since it's always going to be mutable by definition.
 
+#### Labelled break & continue
+
+`break` and `continue` control the innermost `for` loop by default.
+You can also use `break` and `continue` followed by a label name to refer to an outer `for` 
+loop:
+
+```v
+outer: for i := 4;; i++ {
+	println(i)
+	for {
+		if i < 7 {continue outer}
+		else {break outer}
+	}
+}
+```
+The label must immediately precede the outer loop.
+The above code prints:
+```
+4
+5
+6
+7
+```
+
 ### Match
 
 ```v